Made from Galvanized Malleable Iron

250LB Capacity 

Side and Bottom 1/4"-20 Threaded Mounting Holes

15/16" Jaw Capacity 

Standards: ASTM B633, CSA LR-52208

Part/Model: 500-SC, SC J 318

These are high quality, top of the line a favorite of many electricians, plumbers, & other trade professionals.  These are shipped in bulk in a poly bag.