Features: 1. This drill bit use of advanced technology manufacturing, high-quality materials, long service time. 2. Drill holes neat, smooth, no broken edge, will not produce tremor phenomenon. 3. Incision resistance is small, improve the drilling speed, chip removal easily. 4. Can be used for a variety of wood, wood products, plastics, plywood and other materials openings. 5. Easy to install, easy to use, only need to be installed in the ordinary hand drill can be used. Specification: Type: Auger Drill Bit Material: Tungsten Carbide Size: 15mm 20mm 25mm 30mm 35mm Shank Dia: 8mm (15mm 20mm) 10mm(25mm 30mm 35mm) Application: Can be use for product perforation, door installation, shoots, plastic products, wood and plywood Note Please allow 1-3mm error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included: 1pc Forstner Drill Bit _x000D_