The drill made from heat treated hardened Chrome Vanadium (Cr-V) Steel to a long lifetime through tough torque jobs without breaking or rusting heavy duty construction to be compatible with the most powerful impact driver.SIZE: 1/4 inch 3/8 inch 1/2 inch impact driver bits and each with a 1/4 inch hex driver socket wrench adapter setConvert any tools set drill bit set into a nuts socket set.DESIGN: The spring ball lock ensures a tight fit into the driver head to prevent slipping during use. Double tooth hex specifically machined to fit securely into a hand held driver, drill driver or impact wrench.Multifunctional: The extension bit holder is designed to provide a securely locked in extension to your existing . 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.USE: The impact is a useful accessory for conversion. Useful for automotive mechanic vehicle repairs, technicians, handyman & hobbyist developments to use with sockets on hardware tire nuts, lag bolts, hex head cap screws at home, workshop factory or construction site.Material:steelcolour:Black + silverPackage Contents:1 * (1/4 inch hex to 1/4 inch socket)1 * (1/4 inch hex to 3/8 inch socket)1 * (1/4 inch hex to 1/2 inch socket)1 * magnetic extension bit holderOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.