[Suitable for all kinds of floors]Fixed stationary castors have good traction, maintain stability on smooth floor surfaces (wood, tiles, laminates), provide greater traction than casters, and reduce friction, vibration and noise. [Mute and prevent scratches] The height of the fixed feet of chair glides is close to the height of the mounting feet. It is suitable for preventing the air pressure rod from damaging the floor. [Efficient installation]Replacement chair wheels are easy to install and remove, no screws are required, just grab the old casters and pull them out. Then push chair wheels replacement into the holes. [Excellent caster replacement]Replacement glides are suitable for different swivel chairs (executive chairs, chairs, game chairs, tables and chairs)very suitable to roll the stool or chair into a more stable fixed type. Good traction for smooth movements: These sliding devices maintain stability on smooth floor surfaces (such as wood, tiles, and laminates) while providing greater traction than casters., Weight: 0.61949895622 Pounds, Manufacturer: Aisuoka