Features: Socket adapters are made from heavy duty chrome vanadium steel for durability and long service life. The surface of each adapter is finished by electroplating and blackening, which ensures corrosion resistance. Adapter body is designed with a ball bearing to stop the socket from falling off when using. 1/2 inch dr to 3/4 inch step up(1/2 inch dr ratchet or bar to 3/4 inch dr socket), suitable for Impact gun use. These adapters are of small size and easy to storage for much convenience. Specifications: Material: Chrome vanadium steel Surface Finishing: Electroplating, blackening Hardness: 402(HRC) Color: Black Total Size: Approx. 55 x 29mm / 2.16'' x 1.14'' Socket Size: 1/2"(Female)--3/4"(Male) Package Weight: Approx. 197g Package Includes: 1 x Socket Adapter1Socket adapters are made from heavy duty chrome vanadium steel for durability and long service life 2The surface of each adapter is finished by electroplating and blackening, which ensures corrosion resistance 3Adapter body is designed with a ball bearing to stop the socket from falling off when using 41/2 inch? dr to 3/4 inch? step up(1/2 inch ?dr ratchet or bar to 3/4 inch ?dr socket), suitable for Impact gun use 5These adapters are of small size and easy to storage for much convenience