1/2 (0.5 inch (12.7 mm)); SQ. Socket for Impact Wheel Nuts (Thin) Total Length: 4.3 inches (110 mm), 0.8 inches (21 mm), 14145PM.110-21
The socket may break if hung over torque over it, so please stop using it immediately. Please note that due to the nature of the product, the design is thin and cannot be returned or exchanged. *Sold as 21mm each