4-22mm HSS Titanium Step Drill Bit Hex Shank Spiral Groove Metal Hole Cutter Conical Stage Drill Cone Power Tools

HSS Titanium Step Drill Bit Hex Shank Spiral Groove Metal Hole Cutter Conical Stage Drill Cone Power Tools

[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.