Milwaukee 2 Step Drill Bit, 7/8 In. to jam- performance with a dual-flute design that delivers up to twice the hole drilling speed, up to four times longer life, and up to 50% more holes per battery charge d to competitors. This step drill bit is for drilling both small and large-diameter holes in steel and plastic, and it is optimized for use with high-speed cordless drills. Featuring the Rapid Strike™ tip, it provides a fast and accurate start while generating less heat for longer bit tip life. The black oxide coating enhances durability, improves hole quality, and extends the bit’s lifespan. For added convenience and precision, laser-engraved reference marks are visible during drilling. The 3-flat Secure-Grip™ shank ensures a solid connection with the drill chuck. This 2 step drill bit includes five hole sizes in 1/8-inch increments, ranging from 7/8" to 1-3/8". It delivers reliable jam- performance when used with most professional 18 Volt cordless drills equipped with lithium-ion battery technology. Model Number: 48-89-9212