Description: 【Package Including】: You will get 1 set square hole drill bit adapter with handle, a practical woodworking tool. 【Premium Material】: The square hole drill fixed bracket set is made of steel material, wear resistant, high hardness, sturdy and ensures a long time to use. 【Adjustable Clamp】: The square hole drill bit adapter bracket has an adjustable clamp diameter between 38mm-55mm/1.50inch-2.17inch. 【Easy Installation】: Bench drill mortise accessories, the square hole drill bit adapter converter is easy and quick to install and remove, fast and convenient. 【Wide Applications】: The square hole drill bit adapter bracket set is a practical woodworking tool, suitable for bench drill, table drill, and hand drill. Specification: Material: steel Size Chart: Width: 7.5cm/2.95inch Total Length: 16cm/6.30inch Package Includes: 1 Square Hole Drill Bit Adapter, 1 Handle Note: Please allow slightly errors due to manual measurement and different monitors.