1PC 4-12/4-22/4-32/5-21/5-27mm M35 Cobalt Step Drill Bit 6.35mm Hex Shank HSS-Co Cone Spiral Groove Metal Drill Tool Hole Cutter

1PC 4-12/4-22/4-32/5-21/5-27mm M35 Cobalt Step Drill Bit 6.35mm Hex Shank HSS-Co Cone Spiral Groove Metal Drill Tool Hole Cutter

Aliexpress UK