Description Durable and Flexible Ball BearingWith double ball bearing swivel heads, heavy duty swivel casters can rotate up to 360 degrees and move freely. The swivel caster axle has double ball bearing swivel head, which is better than traditional solid bearings. The furniture casters can therefore be used for several years even for frequent and commercial use. Sturdy and DurableWith the elasticity of the rubber casters combined with the metal structure which is sturdy and durable , the furniture casters work solidly. Polyurethane (PU) swivel casters neither scratch the floor nor leave marks on the floor and are safe for floors of all types. Flexible and NoiselessHeavy duty trolley swivel casters can rotate 360 degrees. Industrial casters, like a skateboard, move freely and smoothly even on a hard surface. The casters are sturdy and hardly make noise. Easy to UseThe swivel casters come with the necessary screws and a screwdriver. You can put them together very quickly. Even if you are not natural DIYers, it is easy to install them. Wide ApplicationThese heavy duty casters can be used flexibly for any application. Swivel casters are suitable for DIY your home, garage, and bedroom. Swivel casters are ideal for furniture, office chair casters, bed casters, coffee table casters, plant stands, bookshelves, toy box casters, coffee table casters, workbench casters; even for garden gate rollers.