CASTER WHEELS HEAVY DUTY: Our casters set of 4 heavy duty are adopted industrial-grade electrophoresis plated steel, and durable polyurethane wheels, using precious ball bearings, additional dust-proof ring, which keeps them a long lifespan and makes them to protect against corrosion and rust. BIG LOAD CAPACITY TO SAVE STRENGTH: The rock-solid support of thickened universal steel column and top plate is extremely durable. Each 5 inch caster wheel can bear 600lbs of load, making a total of 2400lbs load capacity for 4 caster wheels. So you can easily maneuver your furniture by spending a little strength. SWIVEL & BRAKE FUNCTION COEXIST IN ONE WHEEL: The heavy duty casters feature a top plate swivel, can rotate 360 degrees to any direction. Besides, the dual locking system can brake while positioned in the forward direction of the wheel as well as the rotation direction. Dual locking and double ball bearing for maximum safety. SMOOTHER MOVE & LOWER NOISE: Our locking casters are made of high quality vibration-absorptive polyurethane material, can reduce vibration, achieve smoother and lower noise. With the swivel casters,no worry move around in different scenirios(even carpet), no more traces on the floor. WIDE USE AND EASY ASSEMBLE: Our industrial casters are easily and conveniently to install, comes with two hardware kits: 16 x bolts,16 x nuts with 1 x screwdriver, 16 x screws,16 x washers with 1 x spanner, satisfy various and different needs. Widely used for indoor and outdoor equipment, like used for cart, furniture, workbench, toolboxes, electrical enclosures, speakers, trolley etc. 5 Inch Caster Wheels Set of 4 Heavy Duty Swivel Casters with Brake