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

Bosch 2608588067 4/6/8/10/12/14/16/18/20/22/24/26/28/30 mm HSS AlTiN Step Drill Bit

Bosch 2608588064 4/6/8/10/12 mm HSS AlTiN 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 2608597526 4/6/8/10/12/14/16/18/20 mm HSS TiN Step Drill Bit