Square hole drill bit adapter is compatible with benchtop drill presses and hand drills with a 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. Ideal for woodworking, furniture making, and related applications, the square hole drill bit adapter functions as a mortise converter that is simple to install and remove, saving time and effort. The square hole drill fixed bracket is constructed for durability and stability. Designed for efficient attachment and detachment of drill accessories, this adapter offers a reliable solution for precise drilling operations. With its accurate design, the adapter ensures consistent alignment and performance during use. 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 Only the items listed above are included. Other products are not part of the package. Note: Lighting effects and monitor settings may cause slight variations in color representation. Measurement may vary by +/- 1-3 cm due to manual measurement.