Thread repair die set used to clean or repair spindle threads, axle studs and wheel stud threads. Contents: M24 x 1.50, M24 x 2.00, M22 x 1.00, M22 x 1.50, M20 x 1.50, M20 x 1.25, 13/16" x 20 UNEF and 3/4" x 20 UNEF. Includes deep socket for dies. Dies are manufactured from chrome molybdenum. Spiraled flutes - help prevent cross threading and give a stronger cutting surface. Use with 1/2" square drive tooling or 27mm spanner.