Irwin HSS Cobalt Drillbits are perfect for drilling stainless steel and other high alloy steels. They have 5% Cobalt for higher heat and abrasion resistance and a heavy-duty web construction for strength and durability. The 135° split point begins drilling immediately, minimising bit walk and are manufactured to DIN 338 Standards.

The IRW10502520 HSS Cobalt Drillbits are supplied in a pack of 10 and have the following dimensions:
Diameter: 4.0mm.
Total length: 75mm.
Working length: 43mm.