Ultra-Tow Bolt-On Side-Wind Marine Swivel Jack - 1,500 Lb. Capacity, Zinc Finish Durable 1/2in. pull pin activates the swivel mechanism, allowing you to swing the jack up and out of the way when not in use Two 6in. casters for easy maneuvering &#160;Bolt-on mount fits trailer frames up to 3in. x 5in. Very accurate and smooth operation &#160;Includes mounting hardware