【Heavy-duty chair casters with unique braking system】: 5 casters included. Each of the casters is very resistant, has a size of 6.35 cm and adapts to each wheel. most office chairs. They have a braking system to help you move forward. Control the caster when you want to stop rolling. 【Easy and quiet rolling】: You can easily move on the chair in the office or at home. the house thanks to the bearings high-precision balls of the roulette and its axis. There will be no squeaking. 【Easy to install. Install: Simply remove the old casters from the chair. Then insert the new casters firmly, making sure they have a good grip on the chair. The screwdriver provided makes it easier for you to insert the casters. 【Universal fit】: Our office chair casters are designed in accordance with standards. They adapt to your needs. Almost all office chairs on the market. Does not damage floors: Move around on your chair in the office or at home without worrying about scratching or damaging your floor. The