Milwaukee 48-89-9205 Black Oxide Step Drill Bit, 1/4 - 1-3/8 in., 10 Steps

Up to 2 times faster: optimized for cordless drills in high speed

Up to 4 times longer bit life: optimized geometry with black oxide coating to cut faster and produce less heat

3-flat secure-grip shank: reduces bit slippage in the chuck

Laser-engraved reference marks: easily stop on any whole size

Jam-free performance: dual-flute design optimized for cordless drills in high speed provides greater speed and control