Superb Material The wood plug cutter set is made of high-quality carbon steel with high precision, high strength, and smooth surfaces. It is corrosion resistant, wear resistant, not easy to break, and durable for long-term use. Multiple Sizes The hole cutters set for wood contains two types of bits, each with four sizes: 1/4 inch (6mm), 3/8 inch (10mm), 1/2 inch (13mm), and 5/8 inch (16mm). Shank diameter: approximately 10mm. Powerful Functions Flexible and easy to operate, this set is ideal for drilling holes and creating round wood plugs. It is also useful for removing old nails and screws from furniture and flooring. Wide Application This wood plug cutter set is compatible with bench drills, hand drills, and other professional drilling machines. To prevent slipping or misalignment during use, it is recommended to use a bench drill or securely fix the drill. Package Includes 4 tapered drill bits and 4 claw drill bits to meet your daily woodworking needs. Please control the drilling speed; excessive speed may cause the bit to get stuck or produce smoke.