Irwin 316015 Drill Bit Set General-Purpose, Cobalt Black Oxide HSS

Constructed of M-42 8% cobalt high-speed steel for super abrasive resistance in tough metals

135 degrees split point reduces feed pressure for easier penetration without work hardening

Durable rubber-sided case for added impact resistance

Sliding latch design provides added security

Available with a variety of drill bit types and piece count configurations