【Widely Used】 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.
【Material】 HSS combined with a titanium coating. More capable and durable.
【Easy Drilling】 Two-Flute Design for smoother cutting. High Step design let you feel the stop and never drill bigger in mistake