Package List】 1 × (4-12 mm), 1 × (4-20 mm), 1 × (4-32 mm) step drill. The step drills have three sizes to meet your different needs. And the package contained a nylon bag.
【Two-Flute Spiral Groove Design】Faster, more stable and smoother cutting. It can automatically chamfer the hole to clean the drill bit.
【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.
【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.
【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.