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. This adapter enhances the versatility of your table drill and hand drill. Ideal for woodworking, furniture making, and related applications. The mortise converter is simple to install and remove, enabling quick setup and拆卸 to save time and effort. The square hole drill fixed bracket is constructed for durability. With its precise design, the adapter ensures accurate and efficient drilling operations. Note: 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 Please note: The actual color may vary slightly due to lighting and display differences. Measurement error is +/- 1-3 cm.