Used Finger Drill Bits, 16 Pieces for sale (26,846)

Condition: as good as new (ex-display), Year of construction: 2025, functionality: fully functional, Table size: 1120 x 280 mm T-slots in table: 3 x 16 mm Table longitudinal travel: 600 mm Table transverse travel: 250 mm Vertical travel: 360 mm Spindle rotation: +/-45° Distance between table surface and spindle face: 230–630 mm Maximum spindle speed (vertical): 108–2400 rpm Maximum spindle speed (horizontal): 90–2000 rpm Spindle taper: ISO 40 Spindle stroke: 120 mm Power: 2.2/2.2 kW (vertical/horizontal spindle) Dimensions: 1700 x 1450 x 2245 mm (W x D x H) Weight: approx. 1350 kg Accessories, features: - 3-axis SINO digital read our system - spindle feedrate in three steps - 200 mm machine vice - 45° tiltable spindle head - Rotating console - Rotating machine table - 2 x reducers (ISO40/MK3, ISO40/MK2) - Drill head with collet, diameter 3 – 16 mm - 2 horizontal milling spindles - 1 x 15-piece chuck set, diameter 2 – 20 mm Godpfx Aajybb T Hoyjbt - Clamping set - Work light - Cooling water system

Condition: new, drill diameter 2.0 - 20.0 mm lip angle 90 - 135 ° Gbsdpfxjxablxs Aayot turning speeds 4800 U/min voltage 230 Volt engine output 0.12 kW weight 8.6 kg range L-W-H 285 x 130 x 170 mm The handy DG 20 M drill grinding machine is ideal for grinding twist drills made of HSS, cobalt and hard metal. Thanks to the adjustable tip angle of 90° to 135°, this model can be used universally for 2-edged twist drills. Properties: - For grinding HSS and hard metal twist drills from 2 - 20 mm - ER 20 and ER 25 collets also enable clamping of intermediate sizes - Optimum grinding result thanks to the specially guided collet - Includes device for sharpening the drill tip - Universally adjustable tip angle from 90° - 135° - Fast and easy grinding process Scope of delivery: - CBN grinding wheel - ER 20 collets, 3 - 12 mm * 11 pieces (3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 /12 / 13 mm) - ER 25 collets, 14 - 20 mm * 7 pieces (14 / 15 / 16 / 17 / 18 / 19 / 20 mm) - Collet holder ER 20 or ER 25

Condition: as good as new (ex-display), Year of construction: 2025, bore capacity in steel (diameter) 35.0 mm bore capacity in cast iron 40.0 mm threading M 24 in Stahl throat 320 mm morse taper 4 MK bore stroke 160 mm turning speeds 65 - 3250 U/min table: 500 x 420 mm throat 320 mm weight 375 kg range L-W-H 600 x 870 x 2170 mm Year 2025 showroom model (!!) Approx. 1 hour of operation Special price on request Furnishing: - Infinitely variable speed, ideal for - Set the desired cutting speed. - Automatic tool ejector and thread cutting device as standard - Electromechanical drilling feed, adjustable from 0.1 - 0.3 mm / rev - Solid gray cast iron table with rotating and swiveling support surface - T-slots in the machine base enable high workpieces to be clamped - Guaranteed concentricity 0.02 mm, measured in the quill - Hardened and ground gears ensure smooth running - Adjustable drilling depth stop with an easily readable scale Scope of delivery: - Key chuck 1 - 13 mm / B 16 - Drill chuck arbor MK 4 / B 16 - Reducing sleeve MT 4/3, MT 4/2 Gbedoxaabrspfx Aayst - coolant device - Thread cutting device - Electromagnetic spindle feed - Automatic tool ejector - LED machine light - First filling with Shell Tellus 46 - Digital speed display - Height-adjustable protective cover

Condition: ready for operation (used), Year of construction: 2002, Professional, heavy-duty version by HANG (German quality) in neat, complete condition. Highly suitable for binderies, printing shops, and print departments. ⸻ Specifications • Brand / Model: HANG 107-30 electronic • Serial number: 102553 • Year of manufacture: 2002 • Number of drilling heads: 4 pieces, individually adjustable • Electronic control, automatic drilling cycle • Power connection: 400V – 50Hz – 6A • CE certification present • Cast iron frame, extremely robust construction • Manual and automatic operation • Adjustable stops with fine adjustment • Machine is mounted on swivel casters (easily movable) ⸻ Condition • Removed from production in working order • Drill spindles and guides run smoothly • No damages, normal signs of use • Immediately ready for operation • Complete, as shown in the photos ⸻ Description The HANG 107-30 is one of the most robust paper drilling machines on the market. Heavier-duty and more professional version than the standard models, thanks to the sturdy drilling heads, automatic drilling cycle, and reliable electronic control system. Perfect for calendar production, book blocks, brochures, index tabs, and more. ⸻ Price 👉 € 3,250 net (0% VAT export possible) Gsdpfx Aajx A Izleyobt

Condition: excellent (used), Year of construction: 2015, functionality: fully functional, spindle mount: MK 3, Meyer Geared Head Pillar Drill Model:SR25 Spindle Taper: No 3 Morse Spindle Speeds:125-2825 RPM Table Area:350 x 400mm (Hand rise and fall / Swivel) Throat:240mm Motor: 0.75 KW With: Chuck Guard Safety Brake Low-Voltage Light Dimensions: 700 x 450 x 1900mm High Gjdpfx Aezrnndeayjbt Weight: 400 KGS

Condition: excellent (used), Year of construction: 1985, functionality: fully functional, power: 4 kW (5.44 HP), tool diameter: 50 mm, spindle mount: MK 5, height adjustment type: electric, rotational speed (max.): 2,500 rpm, rotational speed (min.): 28 rpm, total width: 1,145 mm, total length: 3,100 mm, total height: 3,390 mm, table width: 986 mm, table length: 1,820 mm, overall weight: 4,200 kg, Equipment: documentation/manual, Morse 5 taper in the spindle, max. drilling capacity in steel Ø 50 mm, arm length 1250 mm, base clamping surface 1820 x 986 mm, max. Ø boring capacity in steel – without guide: 120 mm, with guide: 200 mm, spindle stroke: 310 mm, vertical arm travel 750 mm, spindle speed: 16 steps, range: 28-2500 rpm, feed rate 0.05 - 2 mm/min, 16 steps, spindle motor power at 1430 rpm: 4 kW, total power consumption 6 kVA, machine dimensions L x W x H: 3100 x 1145 x 3390 mm, machine weight 4200 kg, the machine can be fully tested in our warehouse in Přerov upon agreement. Gsdpfx Aaozzfbajyjbt

Condition: good (used), Nagel Citoborma 480AB Paper Drill This machine is in very good condition. It has four drilling heads. Technical specifications: Drill bit distance: 45-285 mm Drill diameter: 2-20 mm Stack height: 60 mm Weight: 275 kg Automatic drilling cycle, controlled by a foot pedal and manual buttons. Sturdy construction on a pedestal. The drill table is adjustable in all planes. This is one of the newest Citoborma models. Includes operating tools, instructions, and a new cutting stick and drill bits. Gsdpfezmu Erex Aayjbt

Condition: good (used), Nagel Citoborma 490 Paper Drill This is the largest Citoborma drill currently in production. Very good condition, ready for production. The machine has 4 drilling heads. Drilling waste is discharged into a basket located at the rear of the machine. Gbjdpfszmu Efjx Aayet The machine is operated using a foot pedal or two-handed buttons. Each head has a separate up/down adjustment, allowing for the use of drill bits of different lengths. The set includes spare drill bits, tools, and an instruction manual. Technical specifications: Number of drilling heads: 4 (each head can be quickly removed) Maximum stack height: 60 mm Drill bit size: 2-10 mm Adjustable spacing: 45 – 425 mm Two drilling speeds 380V power supply Weight: 365 kg Made in Germany.

Condition: used, Second-hand machine Fittings drilling machine Pot-hole band drilling machine, fitting drill (Grass drilling pattern) 6 drilling spindles in a row (32 mm pitch) (one spindle on the 8-spindle drill head is defective) 4 additional drilling spindles positioned upstream for counterbore drilling Gbedpfozlbrcsx Aayot Pneumatic hold-down devices, depth stop adjustment Connection: 16 A / 380 V Motor: 1.5 kW Weight approx. 100 kg Dimensions: 3,130 x 1,060 x 710 mm Availability: at short notice Storage location: Flörsheim

Condition: ready for operation (used), H. Hartkämper Coordinate Drilling Machine -Drive: 400 V three-phase -Drilling capacity in steel: approx. 16–20 mm -Spindle mount: MK2 / drill chuck B16 -Speed range: approx. 250–3,000 rpm (multi-stage) -Quill stroke: approx. 80–100 mm -Table size: approx. 1,300 × 600 mm -Travel in X: approx. 350–450 mm -Travel in Y: approx. 180–250 mm -Base: integrated steel frame with storage compartments Dimensions: L x W x H 1.4 x 0.9 x 1.5 meters / Weight 350 kg Gjdpfoztc A Ejx Aaysbt Errors and omissions excepted.

Condition: good (used), Storage location: 3111 Manufacturer: IXION Year of manufacture: 1998 Type / Model: BT 15 Machine number: 186477 Drilling capacity: up to 16 mm Spindle mount: Drill chuck B16 Speed range: 480 to 3,800 rpm Table: 290 x 350 mm Gbsdpfx Ajzcuzasayjt Overhang: 225 mm Stroke: 100 mm Head height adjustment: 300 mm Distance table-chuck: 70 to 370 mm Footprint: 290 x 440 mm Connection: 0.8/1.0 kW Accessories/Equipment: Drill chuck Condition: good Weight: Dimensions: 290 x 440 x 700 mm

Condition: good (used), Base plate, site fence base, barrier base -Footplates: made of concrete, 19 pieces -Intake: 6x Ø 45 mm Godpfx Ajzx Stkoayjbt -Price/delivery: complete -Dimensions: 620/220/H130 mm respectively -Weight 33kg/pc -Total weight: 627 kg

Condition: ready for operation (used), Drill diameter: 16 mm Spindle mount: MK 3 Overhang: 240 mm Gbodezh H Nxopfx Aayet Quill travel: 100 mm Spindle speeds, infinitely variable via pole-change motor and 2 groups: 250 - 4000 rpm Drive motor: 380 V, approx. 1/1.3 kW Approximate footprint: 2200 x 620 x total 1770 mm Approximate weight: 280 kg

Condition: like new (used), operating hours: 20 h, functionality: fully functional, TECHNICAL DATA Gjdpfsy At Ndsx Aaysbt Number of spindles: 21 Distance between first and last drill bit: 640 mm Distance between centers of individual spindles: 32 mm Maximum workpiece size: 50 x 915 x 3000 mm Maximum drilling depth: 65 mm Number of pneumatic hold-downs: 2 Working table height of the drilling machine: 860 mm Maximum hold-down height above table: 70 mm Operating pressure: 6–7 bar Air consumption: 10 l/cycle Motor power: 1.5 kW Noise level: 76.1 dB Speed: 2800 rpm Dimensions L/W/H: 1030/1030/1285 mm Weight: 275 kg PRODUCT FEATURES Main features of the machine: - Single-head drilling machine for drilling operations from 0 to 90° - Pneumatically adjustable drilling head angle - Cast-iron stops - Spindles suitable for quick couplings - Patented pneumatic workpiece clamps - Cast-iron worktable - Fast and precise adjustment - Accurate drilling - Made in Italy Standard equipment of the machine: - 2 aluminium measuring scales, each 1.5 m (right and left) with two stops - 5 quick couplings - Wooden transport box for machine protection during transport ADVANTAGES - Drilling vertically/horizontally/at an angle - Multi-spindle drilling machine - New machine - CE certificate - Robust - Professional Net price €2,950.- Machine shipping not included Packaging included Net prices apply to international transactions and EU customers with a valid EU VAT ID No.

Condition: used, Year of construction: 1987, functionality: fully functional, Drilling capacity in steel (diameter) 80 mm Arm reach 2000 mm Workpiece height - approx. 1300 mm Boring diameter in steel 100 mm Boring diameter in cast iron 115 mm Thread cutting in ST 60 M 68 mm Spindle speeds 16 - 1250 rpm Number of spindle speeds 32 Spindle stroke 550 mm Number of feeds 18 Feed range 0.06 - 3.0 mm/rev Gbedpfey H Dauox Aayst Distance spindle/baseplate 480 to 1800 mm Column diameter 500 mm Spindle motor 11 kW Lifting motor 4 kW Total power requirement 15 kW Machine weight approx. 8,500 kg Footprint 3200 x 1250 x 3600 mm with work table 1500 x 1000 x 500 mm

Condition: used, Clamping devices, clamping claws, deep clamping jaws, clamping pads, clamping tools, step claws, low clamps, clamping irons, accessories -Clamping tool: various designs, 16 pieces -Groove width: 15 - 25 mm Gsdjt Sbbqopfx Aayjbt -Dimensions: see photo technical drawing -Price/Delivery: complete -Transport dimensions: 250/240/H90 mm -Total weight: 14.7 kg

Condition: new, Year of construction: 2026, The CORMAK WS16 bench drill press is a compact yet exceptionally robust column drill designed for precise drilling and tapping operations in workshop and production environments. Thanks to the automatic spindle rotation reversal function, the machine enables efficient thread cutting in steel, making it an excellent solution for users who value productivity and machining quality. Key Advantages Built-in tapping function with automatic reverse rotation – simplified internal threading process High spindle rigidity – precise performance even under heavy load and when machining harder materials Solid construction made of seasoned cast iron – ensures operational stability and long service life Large spindle stroke – 100 mm – extended operating range, especially for deep-hole drilling Clear control panel – intuitive operation with quick parameter adjustment U-type spindle guard with limit switch – CE-compliant and enhanced operator safety 360° rotating worktable with mounting slots – flexible positioning and secure clamping of workpieces Design and Technology The CORMAK WS16 metal drill press is engineered with a focus on durability and structural rigidity. The head, column, base, and table are made from high-grade seasoned castings, ensuring excellent stiffness of the entire structure. The spindle and transmission shafts are manufactured from hardened, heat-treated steel to minimize wear during prolonged use. The drive mechanism is based on a belt transmission system, valued for its quiet and stable operation. Precision and Performance With 5-step spindle speed adjustment ranging from 480 to 1875 rpm and an MK2 Morse taper, the machine allows optimal parameter selection according to material type and drilling diameter. Maximum drilling capacity in steel: 16 mm Maximum tapping capacity in steel: M10 The clear control panel and the ability to switch spindle rotation direction significantly streamline operation while increasing overall efficiency. Applications The CORMAK WS16 column drill is ideal for: metalworking and mechanical workshops maintenance departments training workshops and educational centers single-piece and small-batch production applications requiring high repeatability and precision in drilling and tapping Standard Equipment Adjustable drill chuck with key (MK2 Morse taper) Drift key for taper removal Spindle guard with safety limit switch (CE compliant) Belt transmission cover with limit switch Technical Specifications Parameter Value Max. drilling diameter (steel) 16 mm Gjdpfx Aasrif S Rjyobt Max. tapping diameter (steel) M10 Column diameter 70 mm Column wall thickness 12.7 mm Spindle stroke 100 mm Spindle–column distance 193 mm Spindle–table distance (max) 330 mm Spindle–base distance (max) 613 mm Spindle taper MK2 Speed range 480–1875 rpm Number of speeds 5 Table dimensions 265 × 285 mm Base dimensions 360 × 480 mm Machine height 1130 mm Motor power 1.1 kW Power supply 400 V Net weight 131.5 kg Machine dimensions 600 × 400 × 1150 mm

Condition: new, Year of construction: 2024, New machine Year of manufacture: 2024 Robust drilling machine featuring a powerful OPTIMUM brushless drive. Key highlight: menu-guided control for operating modes drilling/tapping. - Smooth-running and high-performance brushless drive - Optimal power transmission via aluminium pulleys combined with a toothed GATES quality V-belt - High running smoothness thanks to precision-ground multi-spline drive - Concentricity guaranteed at less than 0.015 mm, measured at the quill - Drilling spindle with precision ball bearings - Membrane keypad; dust- and water-resistant, easy to clean - High-quality OPTIMUM quick-action drill chuck included as standard - Separate emergency stop pushbutton - Precisely machined worktable with diagonal T-slots, 360° rotatable - Integrated coolant channel surrounding the worktable - Large, height-adjustable safety guard with interlock switch for maximum operator protection - Drilling depth stop - V-belt guard with safety switch - V-belt tensioning mechanism - Solid, large base plate with reinforced ribs at the rear Gjdpfx Aaew Rhk Rjysbt Technical specifications: Column diameter: 60 mm Dimensions (LxWxH): approx. 552 x 445 x 850 mm Weight: approx. 64 kg Drilling capacity (steel): 18 mm Continuous drilling capacity (steel): 16 mm Tapping capacity (steel): M10 Table size: 230 x 245 mm Speed range: 100 – 6000 rpm Number of speed ranges: 5 Total power connection: 1.5 kW Mains voltage: 230 V Quill stroke: 65 mm Spindle taper: MT 2 Throat depth: 130 mm Including quick-action drill chuck 1–13 mm Including machine vice BMP 100 Availability: short-term Location: Flörsheim

Condition: good (used), Year of construction: 2018, Flame-Cutting and Drilling System Plate Processing Center Manufacturer: Vernet-Behringer Type: MAG EVO 420 Year of Construction: 2018 CNC Control Gbsdpfxsvzrcze Aayot Power Source: Kjellberg HiFocus 360 Plasma Cutting for Material Thickness: 5 to 50 mm Spindle Speed: 160 – 4,000 rpm Automatic Tool Changer Tool Capacity: 14 Drive Power: 16 kW Drilling Diameter: 5 - 40 mm V-Scoring: 5 to 40 mm Sheet Metal Dimensions (min.): 1,500 x 300 mm (750 x 400 mm with limitations) Minimum Dimensions of Finished Parts: 80 x 80 mm Sheet Metal Weight (max.): 2,600 kg and 650 kg/m Infeed Side: Roller conveyor for flat steel or plates: 4,000 x 2,000 mm Zero-positioning cross conveyor Number of carriages: 2 clamping units NC feed carriage, positioned on the side 4 clamping jaws (2+2) 3 short-stroke cross conveyors Working height: 1,000 mm Outfeed Side: Outfeed roller conveyor with a lowerable discharge table and chute leading to a material collection bin for discharging small components. Filter unit including piping Powerful for the use of carbide tools. For drilling, threading, marking, milling, and plasma cutting of flat steel and sheets. Software options for milling and scoring LANTEK license 9926ä Availability: Immediate!

Condition: good (used), Year of construction: 1980, machine/vehicle number: 622336, Offer 22681 Technical Data: - Drilling capacity in steel ST 60: 30 mm - Drill spindle mounting: MK 3 - Drill spindle stroke: 160 mm - 9 drill spindle speeds: 90 - 1450 rpm - Overhang: 300 mm - Table with 2 T-slots - Table dimensions: 400 x 450 mm - Max. distance table - drill spindle: 660 mm Gbjdpfx Aaszp E Ucoyot - Height adjustable via rack and pinion with hand crank - Drive: 400 V / 1.2 kW - Space requirement: approx. W 600 x H 2100 x D 850 mm - Weight: approx. 300 kg - Including: - Drill chuck - 10 HSS drill bits, 8 – 20 mm

Condition: excellent (used), functionality: fully functional, ZANGHERI&BOSCHETTI FM 29 S Multispindle Boring Machine – well-maintained, ready for operation Specification: • Technical condition: used, after professional inspection and complete set of seals replaced • Manufacturer: ZANGHERI&BOSCHETTI (under SCM license) • Model: FS 29 S • 29 drill bits • Left/right drilling spindles Godoymll Depfx Aaysbt • 90 cm between outermost drill bits • Can operate in vertical, horizontal or any other angle within a 0–90° range • 3 pneumatic clamps • Pneumatic movement of the drilling head • Adjustable drilling depth • Original paintwork • Complete set of guides included • Table size: 120 x 70 cm • Weight: approx. 500 kg • Overall dimensions: 110 x 210 x 140 cm (L x W x H) Additional information: • The machine is in very good technical condition, ready for immediate operation • The photos shown reflect the actual condition of the item for sale • Device can be connected and tested on site • The auction price does not include VAT or transportation costs Financing and transport: • We organize transport via MDD fleet, courier companies, or external carriers • Financial support available in the form of leasing or lease loans

Condition: new, Year of construction: 2026, CORMAK ZS-40HS Pillar Drill The CORMAK ZS-40HS is an advanced pillar drilling machine for metalworking, designed for intensive industrial use. Featuring a hardened gear transmission system, large drilling capacity, and tapping capability up to M32, this model is a reliable solution for manufacturing plants, metalworking shops, and maintenance departments. Key Advantages Large drilling capacity – up to 40 mm – suitable for machining a wide range of materials and thicknesses. Godpfjriduxox Aayebt Tapping function with automatic spindle reversal – enables fast and efficient thread cutting up to M32. Precision oil-bath gearbox – 6 spindle speeds provide optimal speed adjustment (95–1600 rpm) for various machining operations. Rotating head with height adjustment – increases flexibility and allows drilling at different angles. Rigid 115 mm diameter column – ensures excellent stability even under maximum load. Large worktable with height adjustment and vise mounting capability – facilitates machining of large workpieces. Construction and Technology The CORMAK ZS-40HS industrial drill press is built with heavy-duty cast iron components and a reinforced 115 mm diameter column, ensuring maximum rigidity and vibration reduction. The transmission system is based on hardened, precision-ground gears, providing exceptional durability and reliable power transmission. The 120 mm spindle travel and MT4 spindle taper allow the use of a wide range of drill bits and tapping tools. Precision and Performance The CORMAK ZS-40HS metalworking pillar drill offers high drilling accuracy and repeatability thanks to its mechanical gearbox and precision handwheel with depth scale. Flexible adjustment of both the drilling head and worktable height allows the machine setup to be tailored to specific machining requirements. The powerful motor (1.1 kW continuous duty S1, 1.6 kW intermittent duty S6) ensures efficient operation even when drilling large diameters. Applications The CORMAK ZS-40HS column drilling machine is designed for industrial applications, particularly in: Manufacturing and processing plants Metalworking workshops Maintenance departments Tool rooms Technical schools and training centers Standard Equipment 16 mm drill chuck MT4 arbor MT3 and MT2 reducing sleeves Drift key for arbor removal Worktable with mounting T-slots Handwheel with depth scale for drilling depth control Technical Specifications Parameter Value Maximum drilling capacity 40 mm Maximum tapping capacity M32 Spindle taper MT4 Spindle travel 120 mm Column diameter 115 mm Spindle speed range 95–1600 rpm Number of speeds 6 Worktable dimensions 575 × 354 mm Base dimensions 385 × 330 mm Motor power S1: 1.1 kW / S6: 1.6 kW Power supply 400 V / 50 Hz Overall height 2100 mm Weight 350 kg

Condition: used, Year of construction: 1985, Used Machine Year of Manufacture: 1985 Gjdpfozk N Dwex Aayobt Features and Technical Specifications: - For horizontal and vertical structural drilling - For vertical row drilling in a 32 mm grid - Vertical drilling unit with dual-spindle drill heads, freely positionable on an indexing shaft - 1.5 kW motor at 1,400 rpm - 1.5 kW motor with 2,800 rpm - Drill heads with pneumatic stroke - Pneumatic workpiece clamps - Passage width approx. 850 mm - Includes various stops and drill bits Availability: at short notice Location: DE-63934 Röllbach

Condition: used, Workbench Column Drilling Machine FLOTT type 16 STG/R2 Spindle: CM2 Spindle exit: 100 mm Spindle speed: from 80 to 2000 RPM Table size: Length 340 mm x Width 280 mm Maxi distance spindle nose/table (lower table): 400 mm Throat depth: 240 mm 2 speed motor 2,2 kW Drilling/tapping function Adjustment by belt variator Electronic RPM speed not working Voltage: 380 V Width: 500 mm Depth800 mm Total height: 1100 mm Weight: approx 150 kg Gedpozzwabofx Aayobt

Condition: good (used), Year of construction: 1975, machine/vehicle number: 620421, Offer 24461 Technical data: - Drilling capacity in steel ST 60 30 mm - Drill spindle holder MK 3 - Drill spindle stroke 160 mm - 9 drill spindle speeds 90 - 1450 rpm - throat depth 300 mm Gsdpsu Atnlsfx Aayebt - Table with 2 T-slots + attached machine vice - Table dimensions 400 x 450 mm - Max. distance table - drill spindle 660 mm - Height adjustable via rack and pinion with hand crank - Drive 400 V / 1.2 kW - Space requirement approx. W 600 x H 2100 x D 850 mm - Weight approx. 300 kg - with: - Drill chuck - 10 pcs. HSS drill bits 8 - 20 mm