Square hole drill bit adapter is compatible with benchtop drill presses and hand drills with clamp diameter ranging between 38 to 55mm (1.5 to 2.2 inches), allowing for easy installation and use. This adapter enhances the versatility of your table drill and hand drill. The square hole drill bit adapter is ideal for woodworking, furniture making, and related applications. The mortise converter is simple to install and remove, enabling quick setup and disassembly to save time and effort. The square hole drill fixed bracket is constructed for durability. For a versatile and efficient solution to install or remove drill accessories, the square hole drill bit adapter is a reliable choice. Designed for precision, the adapter ensures accurate and smooth drilling performance. Note: The square hole drill bit and electric drill are not included. If stored in a humid environment for extended periods, minor surface rust may occur. This can be prevented or improved by applying a light coat of protective oil. Material: Stainless steel Color: Silver Package Contents: 1 x Square Hole Drill Bit Adapter Note: The package includes only the items listed above. Other products are not included. Lighting and display differences may cause slight variations in the color shown in images compared to the actual item. Measurement may vary by +/- 1-3 cm.