The replacement office chair caster is designed with universal standards. Each pack includes 5 heavy-duty casters that fit almost all office chairs sold in the market. Precision ball bearings of the caster swivel and axel provide smooth and quiet rolling. It won’t scratch up your floor or make any squeaky sound as it effectively protects the floor from scratching and damage. Simply pull off the old casters and install the new ones with the help of the screwdriver that comes with them. It can protect all types of floors including tile, carpet, and hardwood. You can step on the brake to stop the chair from moving if the floor is too slippery. Get rid of your old office chair casters and upgrade to premium ones right now!