Sollar Step Set of Hexagonal Bamboo Shoot TiAlN Titanium Hexagonal Shaft Spiral 9 9 5 Double Drill, 3, Shaft, Drill, Spiral, Nitride, Coating, HSS,

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Super-hard material: The surface of the HSSCo step drill is coated with titanium nitride and aluminum, which improves the heat resistance and wear resistance of the step drill, and improves the surface hardness, smoothness and brightness of the entire drill, greatly improving the performance and life of the drill. It is harder and sharper than ordinary steel step drills. Various hole diameters: 4-12mm 5 stages, 4-12mm 9 stages, 4-20mm 9 stages (4, 6, 8, 10, 12, 14, 16, 18, 20mm) The diameter gradually increases from small holes to large holes, so you can drill, enlarge, or repair holes of various sizes. DESIGN ADVANTAGE: Each step drill is stamped with millimeter-level precision to improve the working accuracy. Each step drill is pressed with millimeter-level precision to improve the working accuracy. The double groove design of the hexagonal shaft makes the step drill and the drill more tightly combined. Spiral shape: The screw groove design reduces the pressure during cutting and improves chip removal conditions. Compared to straight drills, it has excellent durability and rotational stability, and has significantly improved chip removal and cooling efficiency. The spiral groove prevents chips from getting tangled and causing scratches. Wide range of uses: Step drills are highly versatile. Suitable for drilling holes in wood, industrial, professional, home DIY, thin steel plates, vinyl, stainless steel, aluminum wood, FRP, resin, etc., as well as hole enlargement, chamfering, and deburring. A must-have item for home and work. It can also be chamfered at the same time as drilling, which saves time.