1. Office chair base replacement: built in rail provides secure, rigid support, enabling the chair to rotate in all directions; replacement parts for swivel chairs. 2. Square swivel bearing plate: simple design and practical to use; seat swivel delivers a comfortable user experience; chair swivel base replacement. 3. Swivel plate for lounger: delivers a calm, smooth rotation; 360 degree free rotation; strong load capacity and stability; turning plate for loungers. 4. Smooth turning plate: smooth polished surface; seat swivel joint stays securely in place and resists scratching; swivel chair turntable. Use scenarios: - Replace worn bases on office chairs in homes or workplaces to restore full mobility and stability. - Upgrade lounge or deck chairs and recliners for easy 360-degree rotation in living rooms or hospitality settings. - Install in conference rooms or waiting areas to provide reliable, smooth swiveling while protecting furniture from scratches.