General description The 38-55cm Square Hole Drill Bit Adapter is designed to enhance the versatility of your benchtop and hand drills. This adapter allows for effortless installation and use, making it an essential tool for woodworking, furniture making, and other related industries. Technical specifications Compatible with drill presses and hand drills with a diameter between 38-55mm/1.5-2.2in Material: Cast steel Measurement allowed error: +/- 1-3 cm Installation The square hole drill bit adapter is easy to install and remove. You can quickly install or disassemble it by yourself, saving time and effort. Usage This adapter is ideal for improving the functionality of your drills, allowing for precise and smooth drilling operations. Other information Package Contents: 1X Square Hole Drill Adapter Note: The square hole drill and electric drill are not included in the package. If stored in a humid environment for a long time, it may cause some surface rust, which can be improved by