Product description Features: The use of advanced technology manufacturing, high-quality materials, long service time. Drill holes neat, smooth, no broken edge, will not produce tremor phenomenon. Incision resistance is small, improve the drilling speed, chip removal easily. Can be used for a variety of wood, wood products, plastics, plywood and other materials openings. Easy to install, easy to use, only need to be installed in the ordinary hand drill can be used. Work noise is small. Type: Forstner Drill Bit Material:60#High Carbon Steel Blade type: arc edge Size: 6-100mm Shank: 8mm/9mm Round Shank Packing Included : 1 x Drill Bits