Milwaukee Black Oxide Step Drill Bit Set

Black Oxide Step Drill Bit Set, 10-Piece Includes: (1) #1 jam-free step bit, (1) #4 jam-free step bit, (8) thunderbolt black oxide drill bits 1/16" - 3/16" 3-flat secure-grip shanks: reduces bit slippage Jam-free performance feature a dual-flute design Laser-engraved reference marks: easily stop on any hole size Rapid strike tip: creates fast, accurate starts and generates less heat Up to 2x faster: optimized for cordless drills in high speed Up to 4x longer bit life: optimized geometry with black oxide coating to cut faster and produce less heat Up to 50% more holes per battery charge: greater user productivity Made in USA MFG# 48-89-9222