[Strong Carrying Capacity] Heavy-duty polyurethane (PU) casters provide the elasticity of rubber wheels and the toughness and durability of metal wheels. The casters fixed by the bolt plate are stable, firm, sturdy, and durable. The maximum load that each 100mm castor can bear is 150kg (4 casters can bear a total of 600kg). Anti-slip rubber caster wheels set of 4 with grooved edges increase grip. [Wear-Resistant] The small wheel rubber slide can be rotated at 360, rust-proof, wear-resistant, noise-reduction, and very stable. The surface for 100mm castors is smooth and will not be caught by hair, debris, and grit. [Stable] The double ball universal head wheel is suitable for all types of floors. Trolley wheels can keep the wheels smooth and smooth when pushed in, without damaging the floor and leaving no marks. [Wide Scope Of Application] Universal wheels are widely used in various industries, such as homes, schools, shops and hospitals, industrial applications, logistics, storage equipment, factories, docks, transportation, mechanical support equipment, etc. It can also be used to move footstools, coffee tables, plant stands, etc. [Appropriate Size] 4 universal casters, each with a height of 120mm and a wheel diameter of 100mm. Two rubber heavy duty castor wheels are equipped with brakes and two are without brakes.