HSS Titanium Step Drill Bit M35 Cobalt 4-32mm Spiral Straight Groove 1/4Hex Wood Metal Hole Cutter Conical Stage Drill Cone Tool

[Advantages]:1. Step drill is triangle round handle or hexagonal handle, prevent sliping. The saw and drill is a round handle.2. "X" shaped openings, drilling is not easy to slip. Higher precision, more sharp, burr-free drilling.3. The gold is titanium coating, more wear and oxidation resistance, not rust.4. The unique step structure, a drill can drill a variety of sizes of the aperture. You can deburring, chamfering, punching elliptical hole.5. The hardness of the workpiece below the use of 25 ° below, such as iron, aluminum, PVC board, insulation board, wood, workpiece thickness 4mm.6. Suitable for installation in the pistol drill and bench drill.[Material]:1.A-B is high-speed steel 4241, hardnesses is HRC62, (Suitable for aluminum, PVC board, insulation board, wood, workpiece thickness 4mm.)2.C-D-E-F is high-speed steel 4241, hardnesses is HRC67, (Suitable for iron, aluminum, PVC board, insulation board, wood, workpiece thickness 4mm.)3. G-H is high-speed steel M35-CO (Suitable for stainless steel, carbon steel, aluminum, iron, etc. limiting the thickness of 4mm or less.)[Packing]:Individual plastic cover package, easy to receive.