【STURDY CONSTRUCTION & HEAVY DUTY】These casters set of 4 heavy duty are with premium thickened steel housing, thickened top plate and each caster wheels has double support bearings. Total loading capacity is up to 2200lbs, each wheel can carry 550lbs, spend little strength to move on.
【DOUBLE SAFETY BRAKE】The 4 inch casters are 360-degree rotating, also each swivel caster has a separate brake which locks both the wheel and the swivel simultaneously. When brake of wheel casters is pressed down, holding the equipment firmly in place, effective to stop and prevent the devices from moving and hurting others.
【SMOOTH & NON-MARKING】The locking casters set of 4 are made of superior polyurethane material, wear-proof, reducing vibration, achieve smooth, quiet, and no drag marks gliding experience on various flooring types, especially on uneven surface. What’s more, every castor wheel has dust-proof ring will improve the casters 4 inch performance by preventing dust coming into the bearings.