The TRAC Trailer Dolly provides an easy way to maneuver your boat in tight spots. You can reposition a loaded boat, snowmobile, utility, and other trailers with very little effort. Includes 1-7⁄8 chrome hitch ball for 1-7⁄8" and 2" couplers. Heavy-duty construction includes 10" pneumatic tires. 700-lb. tongue weight capacity.