Cobalt Jobber Drill Bit Set – 10 PieceCobalt Jobber Drill Bit Set 10pcs is a compact set of fully ground cobalt jobber drills designed for tough metal drilling, including stainless steel and other alloy materials. Manufactured from high quality M35 alloyed HSS with 5% cobalt content, these bits offer high heat resistance and accurate drilling performance, supplied in a handy case for storage and transport. Key Features 10 piece cobalt jobber drill set for tough metal drilling, including