Irwin Unibit #11 HSS 7/8-Inch Step-Drill Bit, 3/8-Inch Shank (10311) USA Made Metric Has 0-180 degree calibration marks

Has 0-180 degree calibration marks

"jack of all trades" head patterns for use in the bush: a 2lb Hudson Bay pattern

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

Edge Protection: Polymer Sheath

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

Irwin Unibit #11 HSS 7/8-Inch Step-Drill Bit, 3/8-Inch Shank (10311) USA Made Metric Has 0-180 degree calibration marksIrwin 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