Draper HSS Cobalt Drill Bit, 8.3mm

Amazon

The addition of cobalt prevents wear for longer life The addition of COB alt to HSS prevents wear for longer life High performance flute design geometry for superior chip extraction D Assured Product Dr Warranty Draper Assured Product It is made from high quality material, Weight: 0.09 pounds, Manufacturer: Draper

Electrical World

Expert Quality, metric-sized high speed steel drills (with 5% cobalt). The addition of cobalt to HSS prevents wear for longer life. Display packed.