Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32" 5/4") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper

【Two-Flute Spiral Groove Design】Enables a faster, more stable and smoother cutting. It can automatically chamfer the hole to clean the drill bit. ●Only sales from XQ7 are quality guaranteed. Before placing order, please confirm product sold by XQ7. 【HSS & Titanium Coated】Made of super strong HSS steel and coated with Titanium, Titanium coating ensures easy cutting steel, Aluminum sheet, Brass, Copper, plastic, wood etc. 【Hex Shank】1/4"(6.35mm) hex shank work with most drill or drills with 1/4" chuck , fits into power tools chuck securely and eliminates slip. 【Application】Suitable for sheet metal, sink, car repair, etc. Widely used to cut holes in a variety of material like plate, aluminum, insulation board, PVC board, the thickness of wood within 5mm. 【Convenience】Step drill allows to cut several sizes hole with one drill bit, easily without changing bit constantly.