3Pcs High-Speed Steel Step Drill Bit Set
Perfect Step Drill Bits suitable for drilling holes in various materials: 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 glass, tile, stainless steel, etc.