X-Drill Step Drill Bit Set - 3 PCS

X-Drill 3 PCS Metric HSS Titanium Coated Step Drill Bit Set Product Features ►It can be widely used, it can drill thin iron plate, aluminum, insulation board, PVC board that the thickness is within 5mm. With a drill, you can drill different holes of sizes. ►High-speed steel 4241 (suitable for the workpieces that the hardness is under 25 degree). The drills are HSS titanium coated.With 3 sets 5 stage + 9 stage + 15 stage step drills. 5 stage: 4-12mm(4, 6, 8, 10, 12mm) 9 stage: 4-20mm(4, 6, 8, 10, 12, 14, 16, 18, 20mm) 15 stage: 4-32mm(4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm) ►Before starting drilling and screwing, the automatic center punch can be used to mark hole locations. It delivers an automatic, high-impact, spring-loaded strike when pressed against wood, metal, and plastic surfaces. Specification Material: High speed 4241 steel Surface Treatment: Titanium plating Cutting materials: thin iron plate, aluminum, insulation board, PVC board that thickness is within 5mm Maximum drilling depth (mm):5 Package Listing ❤Parallel drilling * 3 ❤Automatic Center Punch * 1 Notice 1.During the working time, please always wear protective goggles, mask and gloves. 2.As the drill will produce heat when using, there will be the danger of burning. So don't touch it with your hand. 3.When you use the product drill metal plate, please pay attention that the product need to be cooled by water injection. The step drill is easy to become soft because of high temperature. If you don't cool the drill, it will be scrapped quickly. 4.Our drills are HSS High-speed steel 4241, you'd better not use it to drill the material that is same as our product or drill the material that the hardness is higher than our product.