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PATIKILOffice, craft and home improvement accessories, made by us
3.7mm Drill Bit M42 8% Cobalt High-Speed Steel 135° TiN Coated — PATIKIL

Fasteners & cutting tools

3.7mm Drill Bit M42 8% Cobalt High-Speed Steel 135° TiN Coated

4.4 326 notes

$6.59Low on the shelf

  • One 3.7mm M42 cobalt drill bit
  • 8% cobalt content for hardness
  • Titanium nitride (TiN) coated
  • For medium-high hard metals

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What this bin holds

This 3.7mm M42 cobalt high-speed steel drill bit is ready for your demanding projects. It's engineered for precision and durability when working with tough materials.

This single 3.7mm (approximately 5/32 inch) drill bit has a 32mm flute length and a 70mm overall length. It's made from M42 high-speed steel with a high 8% cobalt content, giving it exceptional hardness, wear resistance, and heat resistance for high-speed cutting. The titanium nitride coating helps prevent friction and wear.

The numbers on the label

What the label says
AisleFasteners & cutting tools
Options in this bin132 sizes and colours
Packing list1 pack of drill bit in 3.7mm(0.15 inch ≈ 5/32 inch) cutting diameter, 32mm/1.26 inch flute
Price across options$6.59 to $67.99
Rating on the listing4.4 from 326 notes

Who takes it home

This M42 drill bit is for serious professional drilling, especially with medium-to-high hard metals. It works well on stainless steel, cast iron, and titanium alloys. Always ensure the drill bit is at a 90-degree angle to your workpiece for the best results.

Next to it on the shelf

Fasteners & cutting tools is where we keep it, with 214 neighbours: washers, screws, blades, files.

3.7mm Drill Bit M42 8% Cobalt High-Speed Steel 135° TiN Coated $6.59

What makers wrote about this bin

  • Got this bit for making a drill bit holder, where holes are drilled into a block of some sort and multiple drill bits stand up next to each other. Not drilling steel, they held up for my small project, but they measure 7.15mm on my calipers which is plenty close enough for what I'm doing anyway.

    RandomGgames · 5 of 5

  • Did the job. Tapped holes in my security door to install a Ring Doorbell. The drill bit made it through like it was drywall.

    Jason Amell · 5 of 5

  • For making an 11mm (ish) hole.

    Chris L · 5 of 5

  • It's a 1.6mm so keep that in mind when drilling, good thing i bought a 4pk. I broke the 1st as I drilled way to fast. Slowed way down and drilled 30 holes in 1.5mm thick carbon fiber without any problems. After the 30 holes the bit still seems mostly sharp. The 1st bit broke, I'm 99.9% sure was my fault.

    Christopher Balko · 5 of 5

Next along the same shelf

3.7mm Drill Bit M42 8% Cobalt High-Speed Steel 135° TiN Coat$6.59