These heavy-duty scaffold casters feature a 1-1/4" square stem compatible with standard stainless tubing, ensuring precise installation for scaffolding, shelving, or industrial platforms. The double lock mechanism secures both wheel and swivel functions, delivering stability under loads up to 440 lbs per wheel (1,760 lbs total). Built with 5mm galvanized steel plates, the casters resist corrosion and wear, while 360-degree swivel rotation enhances maneuverability. A 3.8" stem height and 2.5" center hole placement optimize mounting alignment. Designed for rugged environments, they support heavy machinery, flight cases, and equipment stands with reinforced durability. The combination of high load capacity, dual locking, and industrial-grade materials makes them ideal for warehouses, construction sites, and workshops requiring reliable mobility and safety.