5-Piece Left Hand Drill Bit Sets, M-42 Cobalt High-Speed Steel, 5/64 in to 19/64 in Cutting Diam

Drill bits made of M-42 8% cobalt high-speed steel for super abrasive resistance in tough metals. 135° split point reduces feed pressure for easier penetration without work hardening.. Each drill bit has a heavy-duty spiral flute design that produces fast chip ejection.