HRK1 | Highway Ready Wheel Keeper Kit Includes, (1) Castle Nut, (1) Round Spindle Washer, (1) Round Spindle Washer-LCI (1) Cotter Pin, Fits Some 2.2K, 3.5K, 4.4K, 5.2K, 6K, 7K, 7.2K, 8K, Axles With 1″ Round Spindle With Through Hole