Description: These adapters are handy for attaching a socket sets, ratchet sockets, socket wrench, ratchet universal sockets to an electric drill. Features: This Socket Bit Adapter is Made from premium chrome vanadium steel, it is durable, of high strength and good abrasion resistance durable Ball bearing on head holds sockets securely. 1/4in, 3/8in, 1/2in hex shank fits well with many electric drill. Change your hand socket set into a driven socket with different size. Nickel plating extension bars set can be used for a long time. Specifications: Condition: 100% Brand New Material: Chrome Vanadium Steel Color: Multi-color Size: 1/4in(6.35mm), 3/8in(9.53mm), 1/2in(12.7mm) Length: 72mm, 65mm, 65mm Quantity: 3pcs Weight: Approx. 99g Package Included: 3 * Extension Bars This Socket Bit Adapter is Made from premium chrome vanadium steel, it is durable, of high strength and good abrasion resistance durable Ball bearing on head holds sockets securely 1/4in, 3/8in, 1/2in hex shank fits well with many electric drill Change your hand socket set into a driven socket with different size Nickel plating extension bars set can be used for a long time