【Universal Ball Pulley】The universal caster is made of high-quality ABS and nylon materials, equipped with solid cast steel balls, which are scratch-resistant, corrosion-resistant, and rust-proof. They are very easy to install without any problems. Stable, strong, reliable, and durable. 【Punch-free Design】No tools required for installation. No need to damage objects, installation is simple and convenient. First, wipe the area where you want to install the product. Stick the four characters in the same direction. Please let it stand for 24 hours before use. If you want something more secure, the mini caster has two mounting holes for screw fixing. 【Stable and Quiet Movement】The casters roll smoothly and will not disturb your rest during use, no squeaking or noise. When in use, the self-adhesive furniture casters will not scratch your floors, allowing you to move objects more easily. 【Ultra-strong load capacity】The maximum load capacity of the furniture casters is 15 kg. The bearing