Features: *Brand new and unused *Made of high quality cast aluminum material, wear resistant, high hardness, sturdy and . *Suitable for hand electric drills, but NOT suitable for bench drills and rechargeable hand drills. *Professional woodworking tool, the square hole drill bit adapter bracket helps ensure accurate and smooth drilling. *The square hole drill bit fixing bracket supports the exposed clamping part of the electric hand drill with a width of about 20mm/0.79inch and a diameter of 38mm-43mm/1.50inch-1.69inch. Please confirm the size carefully. Specifications: *Product name: Square Hole Drill Bit Adapter *Color: Silver *Material: aluminum *Size: 5.3cmx15cm/2.09inchx5.91inch *Quantity: 1pc Package Content: 1* Square Hole Drill Bit Adapter Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data. 【Utility and value】If a product is useful to you, it has value when we sell it. 【 Shopping cart 】 Buy multiple pieces at a time, the more affordable the price. 【 Good quality】Made of high-quality material, ensuring durability and practicality in usage. 【 After-sales service 】 Provide 48-hour after-sales service to quickly answer your questions.