Step Drill Bit, Quick Release, Spiral Flute, 7/8 to 1-3/8 in.

The dual spiral flutes on Klein Step Drill Bits help pull the step bit through the material for faster cutting. The aluminum titanium coating is 10 times more durable than steamed black oxide for longer bit life. Impact rated, the 1/4 in. hex shank provides a firm, positive grip and allows quick and convenient usage with an impact driver and a drill. 3 hole sizes with laser marking for easy identification.