Chicago Pneumatic SS4211WP 1/2 in. Drive 11 Piece SAE/Metric Impact Socket Set - Lug Nut with Laser Etch Numbers. Tire Repair Tools Metric Impact Sockets: metric sockets are manufactured from a chrome-moly alloy to ensure durability and high impact resistance. This Socket set is an ideal kit for the user to easily tighten and loosen nut fasteners Heavy-Duty Deep Socket: plastic coating on the socket wall prevents the rims from damaging while the inside plastic cap makes sure log nut is not affected. Metric sockets are supplied in a bio-molded case with handle for portability Applications: these impact sockets are widely used in tire shops, farm tractors/lawnmowers, automotive vehicle mechanics, etc. Drive socket are designed to fit in log nut applications using adapters/extensions Portable Metric Socket: pneumatic socket is laser engraved with extra-large markings for quick and easy identification. These repair tools work efficiently in compact spaces Specifications:  in. drive metric and SAE wheel protector impact socket set includes 3/4, 13/16, 7/8, 15/16, 1, 1-1/16 in., 17mm, 19mm, 21mm, 22mm and 23mm sockets