Irwin Tools Unibit #21 13/16-Inch to 1-3/8-Inch Step-Drill Bit, 1/2-Inch Shank (10221)

Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates

Single-flute cutting edge for greater control through steps

Patented single-flute cutting edge gives the user a true round hole every time

3 faltted shank prevents slipping in drill chuck

Pilot hole required

New SpeedPoint tip provides 6X faster initial penetration time than before, and eliminates the need for center punching. Single-fluted cutting edge assures true round holes, and allows greater control with less vibration. Ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, Plexiglas, wood, and laminates. Coating: Black Oxide Materials: Steel Drill Bit Range Max: 1 3/8quot; Drill Bit Range Min: 13/16quot;.
Brand: Irwin Tools, Model: 10221, Color: Black