Made of cobalt steel material, high hardness, rustproof, solid and durable
The chamfering with a groove, easier to discharge debris and the High Carbon Steel Drill Bit not easy to blunt
High hardness, smooth chip processing, can fulfill the chamfering, deburring, and cone processing. Used for workpiece circular aperture chamfering or cone hole
6 Pcs drill bits with various sizes : 6.3mm, 8.3mm, 10.4mm, 12.4mm, 16.5mm, 20.5mm
Idea for cutting through , aluminum, copper, stainless steel, aluminum plate, insulation boards, and PVC sheet, ect.