Featuring a dual-flute design delivering up to 2X faster whole 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 ; Black oxide coating also enhances durability, whole quality and bit life ; Rapid strike tip: creates fast, accurate starts and generates less heat ; Laser-engraved reference marks: easily stop on any whole size ; 3-flat secure-grip shank: reduces bit slippage in the chuck ; Made in USA ; Includes (1) 48-89-9201 Milwaukee #1 step bit 1/8 in. - 1/2 in., (1) 48-89-9202 Milwaukee #2 step bit 3/16 in. -1/2 in., (1) 48-89-9204 Milwaukee #4 step bit 3/16 in. - 7/8 in.