uxcell 5 Pcs Berg Glide Chair Foot Wheel Stopper Replacement, No Wrench

[Set Contents] - The package includes 5 stationery casters, with overall dimensions of 55 x 86mm/2.17 x 3.39 inches (L*H) and a hole diameter of 11mm/0.43 inches.
[Material] - The surface is made of plastic, and the bottom is made of felt and rubber, featuring strong load-bearing capacity, high and uniform hardness, and excellent wear resistance, which can better protect the floor.
[No Noise] - The integrated design at the bottom ensures noiseless movement. The fixed casters are durable, anti-running, quiet, and wear-resistant, providing an environment that does not scratch the floor.
[Easy to Use] - Turn the knob to ON, and the spring at the bottom will open, pushing out the rubber pad outwards when someone sits on it, switching the function to rubber anti-slip. Turn the knob to OFF, and the spring at the bottom will lock, retracting the silicone pad inwards, switching the function to auxiliary sliding.
[Wide Application] - Widely used in various swivel chairs such as office chairs, gaming chairs, computer chairs, freezers, beds, refrigerators, etc. This is ideal for fixing stools and office chairs.

Wrench is missing.