MOVE TRAILERS BY HAND: Use this trailer dolly to maneuver trailers up to 3,500 lb. (trailer gross weight) such as utility, PWC, cargo and small boat trailers ADJUSTABLE HITCH BALL HEIGHT: 1.875" Hitch ball has a height range of 15.375" to 24.375" to accommodate a wider variety of trailers ASSEMBLY REQUIRED: Arrives ready to assemble with all necessary components STEEL CONSTRUCTION FOR ADDED STRENGTH: Steel dolly features durable hammered-paint finish 10" ALL-TERRAIN TIRES: Two pneumatic tires roll on most hard or semi-hard surfaces, including gravel