Features: 1. Using advanced technology manufacturing, high-quality materials, have a durable life. 2. Drill holes neat, smooth, no broken edge, will not produce tremor phenomenon. 3. Incision resistance is small, improve the drilling speed, remove chip 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. Descriptions: 1. Plated surface treatment for great anti-rust. 2. Little noise, high working efficiency. 3. Widely used in woodworking. Specifications: Color:silver Material: alloy Drilling diameter:35mm Rod diameter:8.5mm Total length:80mm Item weight:69g Package Informations: Package Size:98 x 33 x 33mm/3.86 x 1.3 x 1.3in Package Weight:77g/2.72oz Plastic Box Package Package Included: 1 x Drill Bit Note: There may be some deviation due to manual measurement.