M35 Cobalt Step Drill Bit Tapered 4-12/4-20/4-32mm HSS-CO Spiral Groove Bit Hole Open Saw Spiral Groove Hex Shank Metal Drill

M35 Cobalt Step Drill Bit Tapered 4-12/4-20/4-32mm HSS-CO Spiral Groove Bit Hole Open Saw Spiral Groove Hex Shank Metal Drill

Aliexpress UK