CURT class 1 ball mounts are designed for a variety of lightweight towing applications. For basic utility trailers, canoe haulers and other light-duty trailers, a class 1 ball mount gets the job done. CURT class 1 ball mounts are designed to complement our class 1 trailer hitches. They feature a 1-1/4” x 1-1/4” shank and have a gross trailer weight rating up to 2,000 lbs. They can also handle a maximum tongue weight of 200 lbs.