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. Socket 1: 18.5mm x 19.5mm Socket 2: 21mm x 21.5mm Socket 3: 22mm x 22.5mm Socket 4: 27mm x 27.5mm All sockets: 61mm in length with 1/2" internal drive Extension bar: 75mm long CR-MO for strength and phosphate coated for protection