Material: The drill socket adapter made from heat treated hardened Chrome Vanadium Steel to ensure a long lifetime through tough torque jobs without breaking or rusting heavy duty construction to be compatible with the most powerful impact driver.<br> DESIGN: The spring ball lock ensures a tight fit into the driver head to prevent slipping during use. Double tooth hex shank specifically machined to fit securely into a hand held driver, drill driver or impact wrench.<br> Multifunctional: The extension bit holder is designed to provide a securely locked in extension to your existing tool. Provides additional length to reach into a multitude of hard to reach space. Attach these extender bars to any powered or cordless drill chuck or Impact driver to turn it into a high speed nut driver.<br> Colour: Black<br> Size: as shown<br> Package Contents: 5pcs Color Conversion Post Hex Handle<br> Warm prompt:<br> 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering.<br> 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding<br> 3. Only the above package contents, excluding other products.<br>