CBM Brand New Set of 4 Galvanized Swivel Base Plates 5 1/2" X 5 1/2" Scaffolding CBM1290 Brand New 4 Swivel Galvanized Square 5 1/2"x 5 1/2" Quality Base Plate With 2" Position Holes Compatible with any 1.69" or 1.625" Frame Tubing Supported scaffold poles, legs, posts, frames, and uprights shall bear on base plates Footings shall be level sound, rigid, and capable of supporting the loaded scaffold without settling IF YOU HAVE ANY QUESTIONS PLEASE CLICK ON (CBM1290) then RETURNS.