♣Set Includes--- 4 x 1/4", 2 x 3/8", and 2 x 1/2" Drive each with a 1/4'' hex shaft shank. two adapters in 1/4 (F) to 3/8-inch (M) and 3/8 (F) to 1/2-inch (M) sizes, and two reducers in 3/8 drive (F) to 1/4-inch drive (M) and 1/2 drive (F) to 3/8-inch drive (M) sizes. Set lag bolts and Hex head screws quickly ♣High Quality---The extension adapters are made of heat treated Chrome Vanadium steel with a Black Oxide coating, and the adapters and reducers are made from high-strength, premium Chrome Moly Steel with a Manganese Phosphate coating to help resist rust and corrosion and ensure a life time of use. ♣General Usage---This Hex Shank Bit Driver Extension Bar Set is designed to meet a variety of needs. Fits snugly and securely in your drill chuck or hand held driver. Consisting of your most common bit sizes 1/4", 3/8", and 1/2" changing shank sizes. Provides versatility and convenience no matter which tool you chose to use. Great for the DIY, household maintenance, and most general repairs, not for industrial work. A great tool addition to any tool box set. ♣Purpose---This adapter set 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 spaces. The spring ball lock ensures a tight fit into the driver head to prevent slipping during use. Specifically machined to fit securely into a hand held driver, drill driver or impact wrench.Spring loaded ball bearing on square driver head holder sockets securely. ♣After-Sale Service---We will providing you with the friendliest customer service.welcome to contact us If you have any issues with your Impact Extension and drive socket adapter Set, simply contact customer service for troubleshooting help, parts, replacement, or refund, Weight: 0.32 Kilograms, Manufacturer: EVANCE