Klein Tools QRST2S Step Drill Bit Set, Quick-Release, Double Fluted, 3-Piece Last Chance

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. The 1/4-Inch hex shank is impact-rated, providing a firm, positive grip that allows for quick and convenient usage with an impact driver and drill. Up to thirteen hole sizes with laser marking for easy identification.