Irwin Unibit 10220 Step Drill Bit, 9/16 to 1 in. Dia, 1-Flute, 7/16 in. Dia Hex Shank

Single-flute cutting edge for greater control through steps

Three flatted shank prevents slipping in drill chuck

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

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

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