M42 8% Cobalt Twist Drill Bits Set, 19 Pcs, 1mm To 10mm, For Stainless Steel And Hard Metals, 68 To 70 HRC Hardness, Three Step Cutting For Fast Holes In Aluminum And Plastic, Long Tool Life And Beast Mode Heat Wear Resistance

Premium M42 Cobalt Twist Drill Bits Set for Tough Metals
✔️ 19pc M42 cobalt bits 1-10 mm, 68-70 HRC, 3-step cut

This 19-piece twist drill bit set uses premium M42 8% cobalt steel, delivering superior heat and wear resistance for drilling stainless steel and hard metals. Ideal for metal fabrication, automotive jobs, and DIY projects where fast, long-lasting drilling matters.

✅ 19-piece set includes diameters from 1mm to 10mm in 0.5mm increments
✅ Premium M42 cobalt steel, 68-70 HRC for heat and wear resistance
✅ Three-step cutting design for fast holes in stainless steel, aluminum, and plastic
✅ 135-degree split point helps start cutting cleanly and reduces walk

Diameter (mm)	Length
1.0	3.4 cm
5.0	8.5 cm
6.0	9.0 cm
8.0	11.5 cm
10.0	13 cm

💡 What is a cobalt drill bit used for in metalworking and why should I choose it over standard bits?

In plain terms, cobalt bits excel where heat and wear are issues.

• Handy for stainless steel, titanium alloys, and other hard metals
• Longer life under heavy cutting due to 8% cobalt content
• Three-step design speeds up hole creation and reduces bit breakage
• Reliable for aluminum and plastics in mixed-material projects