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 saving time and effort. The square hole drill fixed bracket is constructed for durability. Designed for efficient and reliable attachment of drill accessories, this adapter provides a practical solution for various drilling needs. With its precise engineering, it ensures accurate and consistent 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 resolved by applying a light coat of protective oil. Material: Stainless steel Color: Silver Package Contents: 1 x Square Hole Drill Bit Adapter Please note: Lighting effects and monitor settings may cause slight variations in color between the image and the actual item. Measurement tolerances may vary by +/- 1-3 cm.