Disston E0102645 Blu-Mol Xtreme Cobalt Jobber Drill Bits, Daimeter 1/16-Inch Provides superior specialized performance needed for extreme high heat encountered with drilling in hard metal, heat-treated steel and stainless steel M35 high speed steel with 5% cobalt content for strong durable performance in hard metal drilling applications 135 degree split point allows faster aggressive cutting without walking