MaterialChrome Vanadium QUALITY: Made from Heat-Treated Hardened Chrome Vanadium (Cr-V) 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 guns.for Universal Socket,Impact Adapter and Reducer Set,Universal Joint Set,Socket Adapter and Drive Reducer Set,Drive Impact Socket Extension Bar Set,Drive Impact Socket SetUsageThis 3 piece 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 1/3" changing shank sizes. Provides versatility and convenience no matter which tool you chose to use. Great for the DYI,Automotive Repairs,Household Maintenance, and most general repairs. A great tool addition to any tool box set.PACKAGE CONTAINS3-Piece Power Drill Sockets Adapter Sets, 360Rotatable Hex Shank Impact Driver Socket Adapter, Socket to Drill Adapter 1/4" 3/8" 1/2" Impact Driver Adapter,Used in the installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool .It is a good accessory for conversion. for Universal Socket,Impact Adapter and Reducer Set,Socket Adapter and Drive Reducer Set,Drive Impact Socket Extension Bar Set.ApplicationThis 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.for Universal Socket,Impact Adapter and Reducer Set,Universal Joint Set,Socket Adapter and Drive Reducer Set,Drive Impact SockWarrantyWe believe in our products there for we offer a 1 year money back guarantee along with a 2 year replacement warranty for this high quality product.And we offer 7*24 hours to convenient for customers.