Milwaukee JAM-FREE 7/8 to 1-1/8 in. x 6 in. L Black Oxide Step Drill Bit 1 pc.Milwaukee Step drill bits with jam free performance feature a dual flute design delivering up to 2X faster hole times, up to 4X longer life and up to 50% more holes per battery charge than the competition. Ideal for drilling large and small diameter holes in steel and plastic, these bits are optimized for cordless drills in high speed. The Rapid Strike tip allows for fast, accurate starts that generate less heat, resulting in longer bit tip life.