Milwaukee Electric Tool 48-89-9203 Step Drill Bit, 1/4-3/4 Hole ", 3, 9 Hole Steps, 1/16" D Step, 2 Flutes, 3/8" 3-Flat Shank

¼ - ¾ no. 3 step bit, Made in the USA, Optimized for use in cordless drills in the high speed setting, Delivers up to 50% more holes per battery charge, Design reduces bit slippage in the chuck