Description:  6.35mm Diameter Hard Alloy Multi-function Triangle Drill Bit Hole Opener.  Specification:  Type:Hexagon hilt;  Cutting diameter:4/5/6/8/10/12mm;  Shank diameter:6.35mm;  Chip flute length:43/43/45/48/55/55mm;  Useful length:43/43/45/48/55/55mm;  Full length:76/76/77/80/83/86mm;  Outer edge angle:45°;  Material:Hard alloy;  Biggest depth of cut:43/43/45/48/55/55;  Blade size:4/5/6/8/10/12;  Smallest packaging:5;  Specification (diameter * full length):4*76/5*76/6*77/8*80/10*83/12*86;  Weight:0.02kg;  Feature:  -Use hard alloy steel, high hardness and wear resistance.  -The incision resistance is small, and the punching is accurate and effortless.  -The shank is cut into a hexagonal shape, the electric drill is clamped more tightly, and it is not easy to slip.  -Compatible with hand drill, lithium drill.  -Vitrified tiles, granite, glass, and all-ceramic tiles need to be operated with water.     Note： -After each use, please wipe clean the surface stains of the product and apply anti-rust oil to prevent rust.  -Various manual tools must be installed according to the correct installation steps, and it is prohibited to use them before the tools are installed.  -Pay attention to wearing safety protection equipment.  -The clamping scope can be used within 10mm.     Package Included:  1 X  Hole Opener