Specification: Aluminum New Material: Chrome Vanadium Stainless Steel Surface Finish: Electroplating, Blackening Color: Black Overall Size (Approx.): 55x29mm/2.16'' x 1.14'' Socket Size: 1/2" (Female)-3/4" (Male)Hardness: 40 ± 2(HRC) The Socket Adapters are made of heavy-duty chrome vanadium steel for durability and long service life. The surface of each adapter is electroplated and blackened for corrosion resistance. The adapter body is designed with ball bearing to prevent the socket from falling out 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 tool use. These adapters are small in size and easy to store for great convenience. Package Included: 1 x Socket AdapterNotes: Please allow slight deviation due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Payments1. We accept Alipay, West Union, TT. All major credit cards are accepted through a secure payment processor escrow.2. Payment must be made within 3 days of placing the order.3. If you are unable to check out immediately after the listing ends, please wait a few minutes and try again, payments must be completed within 3 days. Shipping1.