Irwin 10231 Unibit #1 13-Step 1/4-Inch Step Drill Bit, 1/32-inch Steps (1/8- to 1/2- inches).
The need to change drills when drilling round holes in thin materials is eliminated, saving time.
Each smaller size drill acts as a pilot for the next size.
A patented single-flute cutting edge gives greater control through steps and ensures a true round hole every time.
Drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic, and laminates is ideal.
The SpeedPoint tip penetrates faster than previous Unibits and prevents walking.
A 3-flatted hex shank prevents slipping in the drill chuck.
Drill diameters are etched in the flute for easy identification.
