Square hole drill bit adapter is compatible with benchtop drill presses and hand drills with clamp diameters ranging from 38 to 55mm (1.5 to 2.2 inches), allowing for easy installation and use. It is an ideal solution for enhancing the versatility of your table drill and hand drill. This square hole drill bit adapter is suitable for woodworking, furniture making, and other related applications. The mortise converter is simple to install and remove, enabling quick setup and disassembly, saving time and effort. The square hole drill fixed bracket is constructed to be sturdy and durable. For a versatile and efficient way to install or remove drill accessories, the Square Hole Drill Bit Adapter is a reliable choice. Featuring a precise design, 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 rusting 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 Only the items listed above are included; other accessories are not part of the package. Note: Due to lighting reflections and differences in display screens, the color of the item in the images may vary slightly from the actual product. Measurement tolerances may vary by +/- 1-3 cm.