This 52 piece clamping kit has 24 studs (4 of each length: 3 inch, 4 inch, 5 inch, 6 inch, 7 inch, and 8 inch). There are 6 T-nuts; 6 flanged nuts, 4 coupling nuts, 6 step blocks, 6 serrated end clamps, and 1 holder. The table slot is 3/8 inch and the stud size is 5/16 inch-18. The table slot is 3/8 inch and stud is 5/16 inch-18. There are 24 studs and they hang on mill type rack.