Bosch ground HSS-TiN bit. Suitable for non-ferrous metals, steel sheeting & plastics.

9 steps diameter: 1/4"-5/16"-3/8"-7/16"-1/2"-9/16"-5/8"-11/16"-3/4"
Total length : 70mm
Shank diameter : 9.6mm

13 steps diameter:
1/8"-5/32"-3/16"-7/32"-1/4"-9/32"-5/16"-11/32"-3/8"-13/32"-7/16"-15/32"-1/2"
Total length : 80mm
Shank diameter : 6.3mm