Tackling hard metals like stainless steel, cast iron, and hardened alloys requires tools that go beyond standard high-speed steel. The Metric M42 5% Cobalt Twist Drill Bits (1.5mm-6.5mm/13pcs) are engineered specifically for demanding drilling applications, offering enhanced heat resistance and structural durability for both professional workshops and serious DIY projects.
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Product highlights
- 5% Cobalt Alloy: Incorporates M42 cobalt steel, significantly increasing wear resistance and high-temperature hardness compared to standard HSS bits.
- Precision Metric Sizing: Includes 13 essential fractional metric diameters ranging smoothly from 1.5mm to 6.5mm.
- Designed for Tough Materials: Excels at piercing stainless steel, titanium, heavy-duty carbon steel, and abrasive non-ferrous metals.
Who it’s for
This drill bit set is ideal for metalworkers, machinists, automotive technicians, and advanced hobbyists who frequently work with high-tensile strength metals. If you have ever struggled with dull bits or burnt-out tips when drilling stainless steel, upgrading to an M42 cobalt set offers the performance boost you need.
Key specifications
- Material: M42 High-Speed Steel with 5% Cobalt
- Size Range: 1.5mm to 6.5mm
- Piece Count: 13-piece set
- Application: Stainless steel, hard metals, iron, copper, and aluminum
Selection advice
When working with cobalt drill bits, remember that they are harder but also more brittle than standard HSS bits. To maximize their lifespan, use a lower drill press speed, apply steady and even pressure, and use cutting fluid to keep the bit cool during extended drilling sessions.
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