OverviewMilwaukee 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 competitors. Ideal for drilling small and large diameter holes in steel and plastic, Optimized for cordless Drills in high speed. With rapid strike tip allowing for fast and accurate start that generates less heat, resulting in longer bit life. Black oxide coating also enhances durability, hole quality and bit life. For user convenience and accuracy, each bit has laser-engraved reference marks you can see while drilling, The 3-flat secure-grip shank ensures a solid connection with the drill chuck. Features Jam-Free performance: DUal-flute design provides greater speed and control Up to 2x Faster: Optimized for cordless drills in high speed Rapidstrike Tip: Creates fast, accurate starts and generates less heat Up to 4x Longer but 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 Laser-engraved reference marks : Easily stop on any hole size 3-Flat secure-grip Shanks : Reduces bit slippage in the chuck Includes 1 - #7 Step Drill Bit - 7/8" Single Hole (48-89-9207) 1 - #4 Step Drill Bit - 3/16" - 7/8" by 1/16" (48-89-9204) 1 - #12 Step Drill Bit - 7/8" - 1-3/8" (48-89-9212) 1 - #1 Step Drill Bit - 1/8" - 1/2" by 1/32" (48-89-9201) 1 - Carrying Case