Neilsen CT4231 11-piece Special Socket Set For Grooved Nuts, 22-75mmNeilsen CT4231 11 piece Special Socket Set or Grooved Nuts 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