These caster stoppers allow you to focus on your work by securing wheeled chairs in place. They can be used not only for chairs, but also for securing wheeled cabinets, racks, and more. Installation is simple: just place the stoppers under the casters, adjusting to the wheel's position. The resilient rubber stoppers absorb impact, preventing vibrations and noise when sitting, and also protecting the floor. When you don't need the stoppers, simply remove them from the casters, allowing you to switch between using them or not depending on your task. They are useful for studying, working, gaming, and of course, for earthquake preparedness, among various other uses. ◎Size ・Body: 8 x 8 cm ・Mounting Range: 64 x 50 mm