The Curt 2-5/16 in trailer ball does not mess around. Simply put, it is a solid piece of towing equipment that makes all others look like they're just spinning their wheels. Curt 2-5/16 in trailer balls are made with expert engineering to be packed with strength and durable enough to withstand the harsh wear of heavy-duty towing. Anything your class 5 trailer hitch and class 5 ball mount can handle, Curt has a 2-5/16 in trailer ball to match. These tow balls are perfect for towing all types of heavy receiver-style trailers, including dump trailers, toy haulers, farm trailers, chopper boxes, dual-axle utility trailers, deluxe RVs, small yachts and more.