Curt 1-7/8" trailer balls are constructed from high-strength steel to match the towing power of your class 1 or class 2 trailer hitch and ball mount and come with fine threads on the shank for improved holding strength. Having a trailer ball that matches your coupler size is absolutely essential. At Curt, our trailer balls are engineered to be precisely fitted. When we stamp 1-7/8" into the top of each hitch ball, we actually mean 1-7/8". This Curt tow ball features a ball capacity of 3,500 lbs. It is able to tow most utility trailers, boat trailers, campers, smaller livestock trailers and some recreational vehicle haulers. As with any trailer, be sure that your towing equipment is capable of handling the load before hitching up.