Fixing Bracket: The role of the square hole drill fixing bracket is to support the exposed clamping part of the electric hand drill, its width is about 20mm/0.79inch, the diameter is in the range of 38mm-43mm/1.50 inch-1.69 inch, you need to carefully check the size before use Easy to Install: The square hole drill adapter insert tool has convenience in installation and removal, its operating process is easy, the user can complete the installation or removal work according to the corresponding steps, the process is more convenient Easy to Use: As a professional woodworking tool, the square hole drill adapter bracket has an important role to play in woodworking operations, it can provide effective assistance for drilling operations, which helps to that the drilling handling achieves accurate results and runs smoothly Premium Texture: The square hole drilling rig mounting bracket is constructed from premium aluminium, which is wear and has high hardness, allowing the mounting bracket to show good stability in the process of use Adaptation Range: The square hole drill adapter has a certain range of adaptability, it can be used for handheld drills, but it is not suitable for tabletop drills and rechargeable drills, Weight: 0.56107645679 Pounds, Manufacturer: Taviko