Irwin Unibit #11 HSS 7/8-Inch Step-Drill Bit, 3/8-Inch Shank (10311) USA Made Metric Middle handle exhaust with 360°

Middle handle exhaust with 360° adjustable deflector directs air away from the operator

Tommy bar with rounded ends for simple transfer of force when clamping

Directional:

The unit has old packing grease on the machined surfaces that is easily cleaned off

manufactured of high quality alloy materials

Irwin Unibit #11 HSS 7/8-Inch Step-Drill Bit, 3/8-Inch Shank (10311) USA Made Metric Middle handle exhaust with 360°Irwin Unibit #11 HSS 7 8 Inch Step Drill Bit, 3 8 Inch Shank (10311) USA Made The shanks on these step drill bits have three flats that help prevent the bits from slipping in the drill chuck during drilling. These cone shaped bits have steps of increasing diameter marked along their cutting head. As each bit is pushed into a piece of sheet metal or other thin material, each step on the bit widens the hole. The bits also have a self starting split