Designed for demanding environments, this rotary plate combines solid ball bearing rings with a robust steel construction that not only ensures an incredible 500 lbs. load capacity, but also delivers unprecedented smooth rotation. 360° of unimpeded seat rotation, thanks to the internal precision layout of 46 solid ball bearings and special lubricants, each rotation is smooth and natural, completely farewell to the old rotating base of the stutter and noise. More ball bearings mean a more balanced weight distribution, making every spin a treat. Easy and quick installation, simply measure the bolt hole spacing of the old swivel and you can easily replace it. The package includes two 8 in. black finished load bearing plates with a thickness of 0.9-1 in. to ensure stability and durability. Whether it is for home use or business, it can meet your dual pursuit of quality and durability. A wide range of applications, it is not only the ideal companion for bar stools and counter stools, but also easily integrated into a variety of furniture such as rocking chairs, boat seats, custom rotating tables and even for kayak seats, Murphy beds, rotating supports and other creative scenes. Material: Metal.