1. This is a carbide woodworking tool, a cylindrical hinge cutter for boring holes. It comes in various sizes including 16mm, 18mm, 19mm, 20mm, and 22mm. 2. Specifically designed for working with wood and plastic materials, it can effectively create precise holes for hinge installation. 3. The 22mm size option is available as a single piece, providing a convenient choice for your specific hole boring needs. 4. Made of carbide, it high hardness and durability, ensuring longlasting performance during woodworking tasks. 5. Ideal for both DIY enthusiasts and professional woodworkers, this tool simplifies the process of making accurate holes for hinges in wood and plastic projects. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store