Check the listing for details. 4 Point Square Socket 1/2" Drive 18mm Metric Square Impact Socket CR-MO. Condition: New. Listed at 18.47 USD. Why Choose This:★Size - 1/2" Drive; 18mm Square Impact Socket; Total Length: 45mm / 1.77"; Package Includes: 1 x 4 Point Square Socket.★Application - The specifications of the square socket are engraved on the surface and are clearly visible. You can quickly switch between different socket sizes while working to improve work efficiency. Square wheel impact sockets are widely used for removing and tightening square head bolts and nuts of various structural fasteners. Suitable for automotive repair, DIY handcrafting, construction, and machinery maintenance.★Feature - The port of the impact socket adopts a 4-point square structure, which can better fit the square head of the screw or nut, providing a stronger grip when used, preventing the fastener from becoming round, and is not easy to slip.