【Multiple Use】4 inch swivel casters perfectly fit for workbench,luggage rack,transport cart,trolley,food service cart. Easy to use and install,suitable for hardwood,laminate,tile,slate and other hard floors 【Heavy Bearing and Durable】High quality polyurethane casters. Load capacity on one wheel 300 LB and 1200 LB in total for 4 pieces 【Ensure safety,smooth and quiet】Double locking brake. The wheel and the shaft are locked at the same time,ensuring that the cargo does not move when parked. Roll smoothly and smoothly,without noise when moving. And will not leave scratches on wheels or floors 【Universal Casters】 360 degree rotation and flexible swivel plate. Convenient and smooth scrolling and easy transition of heavy objects 【Packaging and Warranty】 4 sets of casters and lifetime warranty. Note: Please purchase the corresponding screws in advance when installing