●900 LBS Capacity: Heavy duty upgrade wheel casters with 900 LBS capacity is more durable.Work smoothly and steadily for heavy duty equipments. ●360-DEGREE MANEUVERABILITY:The free-pivoting swivel mechanism ensures a proper 360 rotation, providing optimal control and maneuverability to turn tight corners. ●MOBILE AND CONVENIENT:The heavy duty wheel casters are constructed with durable thicker steel that can easily transform your stationary 900lbs workbench to a mobile workbench. Three holes on the top and bottom of the plate, durable wheels and bearings. ●RETRACTABLE CASTERS: To lift the workbench to an fixed heightviding optimal control and maneuverability to turn tight corners. ●EASY INSTALLATION:The workbench casters include 4 workbench caster assemblies with assembly hardware, all the necessary mounting hardware, full instructions for quick and easy mounting of the workbench casters to a standard flat base surface.