FULL BEAD SOLID STRUCTURE - The swivel plate bar stools are made with high-quality stainless solid steel ball-bearing construction with a black coating finish. 2mm thickened solid steel, much thicker than regular swivel plates. The turntable can bear a load capacity of approximately 132-176 lbs. 360 FREE ROTATION - 360-degree rotation on pre-lubricated ball-bearings full round track. This bar stool swivel plate features 40-50 ball bearings for smooth and easy rotation with low noise. Not easily deformed or damaged, ensuring long service life with smooth operation. MULTIPURPOSE - This swivel plate is suitable for various applications including swivel chairs, bar stools, bar chairs, boat seats, kayak seats, murphy beds, swivel stands, sofas, rotating brackets, display cabinets, display stands, TV stands, wooden turntables, station assembly line rotations, gift boxes, and more. MEASUREMENT - 6.25" x 1" size dimension, 2.5mm thickness. Mounting hole distance: 4.9" (Minimum 120x120mm; Maximum 130x130mm). Hole size: 7x21mm. Mounting hardware not included. Load capacity: The front and back are integrally fastened, providing good bearing performance, capable of supporting 60-80kg.