1.[Upgraded Structure for Ultimate Stability] Adopts thickened universal steel column, combined with reinforcement plate and double support bearing, providing unparalleled stability and load-bearing capacity. Made of high-strength stainless steel electrophoresis bracket and high-quality polyurethane to ensure long-lasting durability. Wear-resistant and noise-reducing steel balls ensure smooth and quiet rolling without drag marks. Comes with a full set of screws for easy installation. Total load-bearing capacity: 2400 pounds. 2.[Reliable Locking Brake System] Equipped with four 4-inch casters, each with an individual brake, it can lock the wheel and swivel mechanism at the same time, effectively fixing the device in place to prevent any unwanted movement or potential injury. 3.[Effortless 360-degree maneuverability] The 360-degree swivel top plate can be easily maneuvered in any direction with minimal effort. The large size of the 4-inch caster ensures smooth and easy rolling. See pictures for detailed dimensions and specifications. 4.Versatile and traceless solution for any environment Use these durable and wear-resistant casters to turn any table, chair, shelf or other item into a mobile masterpiece. They glide smoothly without leaving any marks on the floor, making them ideal for industrial and residential applications. These furniture and workbench casters are suitable for a variety of scenarios, labor-saving and convenient.