15 Pc Cobalt Set, 1 16 in to 3 8 in Cut Diameter ORS NASCO recyclable paperboard holder protects Paintstik® recyclable paperboard holder protects Paintstik® for maximum use Available in regular and king size and valve packing nuts Extra wide opening offset model is ideal for securing drain nuts on sinks and tubs Constructed of M 42 8 percent cobalt high speed steel for super abrasive resistance in tough metals 135 degree 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