1. Mobile Stability and NoiseFree These furniture casters can be moved smoothly and without leaving marks. The casters and wheels for moving heavy objects will not damage your wooden floor. They move silently, you won't hear any squeaking anymore. 2. The swivel casters are made of highquality rubber and the steel top plate really helps with moving, is noise and leaves no marks, without causing vibrations, rattling, squeaking and other hazards and problems. 3. Braking System double brake design, stop, easy to operate, nonslip, stable. Fully locked brakes effectively block the wheels and the turntable, ensuring a balance between userfriendliness and braking. This is crucial for the of people and goods. 4. Durability The caster rotates on the shaft and the builtin ball bearing 6202 allows for very flexible operation. Excellent load capacity, the maximum load of the four wheels is 390 kg. With dust ring, dust protection and effective antiroll protection, the bearing can be protected and allows for easy rolling for many years.