Quality: Socket adapters are made of heavy-duty chrome vanadium steel for durability and long service life. Durability: The surface of each adapter is finished by electroplating and blackening, which ensures corrosion resistance. Designed: The adapter body is designed with a ball bearing to prevent the socket from falling off during use. Convenient: These adapters are small in size and easy to store for much convenience. 1/2 dr to 3/4 step up (1/2 dr ratchet or bar to 3/4 dr socket), suitable for impact gun use. Corrosion-resistant adapters, ready for weekend enthusiasts. Features: Socket adapters are made of 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. The adapter body is designed with a ball bearing to prevent the socket from falling out during use. 1/2 to 1/4 (1/2 ratchet or 3/4 socket bar) - Suitable for use with impact gun. These adapters are small in size and easy to store for much convenience. Specifications: Material: Chrome Vanadium Steel. Surface Finish: Electroplating, Blackening. Hardness: 402 (HRC). Color: Black. Socket Size: 1/2" (Female) - 3/4" (Male). Package Includes: 1 x Socket Adapter.