MILWAUKEE Step Drill Bits far surpass the competition. With a single cutting edge design, you will have more control and a cleaner finish. Made of high speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new Rapid Strike tip prevents bit walking and allows faster penetration. With laser etched markings that are hard-wearing and a 3-Flat Shank you can be confident while drilling with MILWAUKEE Step Drill Bits.