This is a new WORKPRO 1/2-inch drive deep socket with a 21mm size and a 6-point design, intended for impact use on lug nuts. Its thin wall construction can be helpful when working in tighter spaces around wheel assemblies. The socket is designed for automotive tasks like tire changes or brake work. Free shipping is available for this item. As specifications can vary, check the listing for full details on dimensions and compatibility to ensure it meets your needs. WORKPRO 1/2" Drive 21mm Deep Thin Wall Socket 6-Point Impact Lug Nut Socket US. Condition: New, Made in China. Listed at 12.99 USD. Application: This 21mm lug nut impact socket pairs with a 1/2" drive torque wrench for precise, safe lug nut installation and removal. Drive Bit Shank Stylehex shank. Easy Size Identification: Laser-etched size markings resist wear, and color-coded electrophoretic coatings help quickly distinguish each socket size.