Bosch 2608587433 4/6/8/10/12/14/16/18/20 mm 1/4 Inch Hex HSS TiN Step Drill Bit

Bosch 2608597526 4/6/8/10/12/14/16/18/20 mm HSS TiN Step Drill Bit

Bosch 2608588070 4/6/8/10/12/14/16/18/20 mm 1/4 Inch Hex HSS AlTiN Step Drill Bits

Bosch 2608588066 4/6/8/10/12/14/16/18/20 mm HSS AlTiN Step Drill Bit

Bosch Accessories 2608597524 4/6/8/10/12/14/16/18/20 mm HSS Step with 1/4 Inch Hex Drill Bits