Irwin 10234 Unibit #4 12-Step High Speed Steel 3/8-inch Step Drill Bit, 1/16-inch Steps (3/16- to 7/8-inch) Save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. Made from industrial-grade high-speed molybdenum steel heat treated for maximum durability. Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. SpeedPoint tip penetrates faster than previous Unibits and prevents walking. Non-skid tip does away with the need for center punches 3-faltted hex shank prevents slipping in drill chuck. Drill diameters etched in flute for easy identification.
Features
Pilot Point Tip starts on contact for clean, accurate holes and reduces lock-up on breakthrough
No-Spin Shank eliminates the frustration of bit spinning in the chuck
Tapered web provides greater durability to reduce breaking
Size markings are located above the shank to prevent wearing away
