11pc Special Socket Set or Ball Joint Socket Set 1/2in.Dr Sizes : 22 - 75mm 4 Tooth Sockets for removing castellated lock nuts found on ball joints / axles and other applications. Sizes mm : Outer Inner Tooth 22.0 | 15.5 | 2.6 26.0 | 18.5 | 2.6 30.0 | 21.5 | 3.5 33.0 | 25.0 | 3.8 37.0 | 27.5 | 4.0 44.0 | 33.5 | 4.5 50.0 | 38.5 | 4.7 56.0 | 44.5 | 4.7 63.0 | 50.5 | 5.7 69.0 | 55.5 | 5.5 75.0 | 61.5 | 5.5