1. Size Packaging: The package includes three bar stool swivel plates (155 x 155 mm) with a height of 8 mm, 5 mm long mounting holes, and a hole diameter of 120 mm. The mounting holes are correctly aligned, and installation takes only a few minutes. Tighten the screws only after all screws are in place. 2. Material: The square seat swivel base is made of metal with a smooth surface, offering good stability, impact resistance, and loadbearing capacity. It is resistant to rust and deformation, ensuring longterm use. 3. Smooth 360Degree Rotation: The Lazy Susan turntable plate features ball bearings and a fullcircle rail design, ensuring even force distribution for smooth and silent 360degree rotation. This enhances operational stability and flexibility while providing a quieter user experience. 4. Easy to Use: The seat swivel mounting plate is simple to operate and can directly old or wornout bar stool swivel plates to restore smooth rotation. It is suitable for repairing or modifying unstable chairs. After installation, noise or friction sounds can be effectively avoided.