Combination Steel Step Block & Clamp Set A complete set of coupling nuts, studs, flange nuts, step blocks and step clamps for complete set-up operations. Holder included to help organize components within reach of the operator, for safer setups in less time. Specifications... 1/2-13 Stud Threads T-Slot Size: 5/8" Set includes... 24 Studs 4 ea: 3", 4", 5", 6", 7" & 8" 4 Coupling Nuts 4 Flange Nuts 6 Serrated End Clamps 6 Step Blocks 4 T-Slot Nuts T-Slot Cleaner Set Holder