6-Piece HSS Step Drill Bit Set (4-12mm, 4-20mm, 4-32mm) - High-Speed Steel Hole Saw for Metal, Wood & Plastic Cutting - Perfect for DIY, Woodworking & Metal Fabrication Projects

Before Use, Check the Power and Stiffness of the Machine Tool to Ensure That the Required Diameter of the Step Drill bit Can Be Used on the Machine ToolDescription:Material:High-speed steel 4241.Handle:Step drill is triangle round handle,prevent sliping.the saw and drill is a round handle.Surface treatment:the gold is T-itanium coating,more wear and oxidation resistance,not rust.Specification:4-12mm 5 Steps(4mm,6mm,8mm,10mm,12mm)4-20mm 9 Steps(4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm)4-32mm 15 Steps(4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm)Saw drill:3mm,6mm,8mm.Advantages:1."X"shaped openings,drilling is not easy to slip.Higher precision,more sharp,burr-free drilling.2,the uni-que step structure,a drill can drill a variety of sizes of the aperture.You can deburring,chamfering,punching elliptical hole.3,Suitable for installation in the pistol drill and bench drill.4,the hardness of the workpiece below the use of 25°below,such as iron,Alum-inums,PVC board,insulation board,wood,workpiece thickness 4mm.Package include:6 PCS Step Saw Drill Bits Set(with Box)