58 pc 1/2" Slot 3/8"-16 Stud HOLD DOWN CLAMP CLAMPING SET KIT BRIDGEPORT MILL High grade hardened steel Table T-Slot size: 1/2" Stud size: 3/8"-16 Includes: 24 studs (4 pieces of each 3",4",5",6",7",8" long), 6 step block pairs 6 T-nuts, 6 flange nuts, 4 coupling nuts, 6 end hold-downs, Wall case