[Features] Self-locking design, quick change and release screwdriver bit, no cumbersome steps, convenient and fast Designed for 1/4" hex shank bits, suitable for electric drills, screwdriver, batch head and other to transfer, to extend various screwdriver bits and screwdriver head conversion uses 60mm extend length comes in very handy as it makes it easier for you to maneuver your power driver around the workpiece. [product information] product name:Hexagonal Adapter style:60mm Hexagonal Shank Black Cap Quick Release [Bag] (27g) Material:alloys size:60mm Packing list (you can get after purchasing one item): Hexagonal Adapter*1 Please understand: 1.Due to the long shipping time, the item may be damaged during the shipping process, if the item is damaged, please leave us a message through the official website immediately before posting comments, and I will solve the problem for you. 2.Due to manual measurement, the size may have an error of 1-3cm. 3.Colors may vary from monitor to monitor.