Features 1、Newly designed woodworking drill bit with positioning function, the drilling depth can be adjusted from 10 to 50mm, including five common opening diameters 15/20/25/30/35mm. 2、The holes are neat, flat and without broken edges, and no vibration occurs. 3、The cutting resistance is small, the drilling speed is increased, and the chips are easily taken out. 4、It can be used for opening holes in various wood, wood products, plastics, plywood and other materials. 5、The product is easy to install and use. Just install it in a normal hand drill. Specification Features: Newly designed woodworking drill bit with positioning function, the drilling depth can be adjusted from 10 to 50mm, including five common opening diameters 15/20/25/30/35mm. The holes are neat, flat and without broken edges, and no vibration occurs. The cutting resistance is small, the drilling speed is increased, and the chips are easily taken out. It can be used for opening holes in various wood, wood products, plastics, plywood and other materials. The product is easy to install and use. Just install it in a normal hand drill. Specification: Material: Carbide Hole depth adjustment: 10~50mm Total length of drill bit: 78mm Shank length: 27mm Shank diameter: 7, 8mm Opening diameter: 15mm, 20mm, 25mm, 30mm, 35mm Package weight: Approx. 500g Package list: 5 * Drill Bit 2 * Hex Wrench Package List