Full Technical Description: Malleable Iron Material; Silver Electroplated Finish; 2-1/8 Inch Max. Jaw Capacity; Hanging Rod Application; 1250 Pound (Set Screw) Load Capacity; 1/2 Inch-13 TPI Screw Size; Yes Supplied With Screw; Approval CSA; Base Size 2-7/16 Inch Length X 2-9/16 Inch Width