Okar's hand socket is specifically produced for auto repairing and machine assembling. Our hand-operated socket is made from CrV alloy steel, and we apply advanced cold forging technology for a better configuration of the spline socket. With a controlled heat treatment, the square drive socket has the right hardness, excellent durability, and a long lifetime. Each hand tool has an ultra-thin design and high torque power, and all of our sockets and accessories meet or exceed ANSI and DIN standards. With square drive sockets that are 1/4", 3/8", and 3/4", as well as #5 spline SAE, metric sockets, and custom-designed sockets, customers are sure to find just the right tool they need. Our hand sockets can be used together with impact wrenches and torque wrenches.