HFS Brand 58pc 5/8" Slot 1/2"-13 Stud HOLD DOWN CLAMP CLAMPING SET KIT BRIDGEPORT MILL High grade hardened steel Table T-Slot size: 5/8" Stud size: 1/2"-13 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