"Quickly transport a cargo, utility, PWC, or small boat trailer with the Elevate Outdoor boat trailer dolly. Each dolly features a 15.375"" to 24.375"" adjustable-height 1-7/8"" hitch ball, durable 10"" tires, a 13"" angled support stand, and a long handle for added leverage while moving trailers. Hitch ball features a 5/8"" diameter shank. Rated for use at a maximum 3,500 Gross Trailer Weight (GTW), OR a maximum 600-pound Tongue Weight (TW). Some assembly is required prior to use. Made with steel construction and a durable hammered-paint finish."