Child Works presents the commercial Heavy-Duty Flat Plate Tire Swivel in their line of extra duty tire swivels. The design includes a rubber boot protecting the moving parts. There is a grease fitting to ensure better maintenance along with a three point mounting system that lessens tangles and pinches. The top plate is introduced for installation through a wood or steel beam. The top plate that is included mounts to flat surface. Tire swivels are an absolute necessity for a tire swing to function properly. The swivel comes at an extremely affordable price, so request a low price online.