HSS Step Drill Set-3PCS Suitable for drilling, tapping, cutting on soft metal, iron. Drilling and tapping in one, processing, greatly save processing steps and improve working efficiency. Self-centering point, do not need assistant center drilling or center punching. High hardness, rustproof, solid and durable. Package includes: 6 x metric HSS titanium screw tap & drill bits. Perfect Step Drill Bits suitable for drill holes in various material Within 3mm/0.12 inch (Iron Plate, Copper Plate, Aluminum Plate) within 5mm/0.2 inch (Wood, PVC sheet, Insulation Boards). Not suitable for hard and brittle materials such as stainless steel, glass, tile floors, walls etc. HSS combined with a titanium coating. More capable and durable. 3-Piece HSS Groove Step Drill Bit (4-12mm, 4-20mm, 4-32mm ). HSS Step Drill Set-3PCS (4-12mm, 4-20mm, 4-32mm)
