Designed to aid the removal of wheel nuts with damaged, distorted or missing caps found on all modern car models. The flip design offers two sizes on the same socket and has a thin wall for better access. The socket has an internal square drive of 1/2" and is made from chromium molybdenum for strength and is phosphate coated for protection. Sizes: 18.5mm one end and 19.5mm the other 1/2" internal drive 61mm in length Thin wall CR-MO for strength and phosphate coated for protection