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 theyre 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 (NOTE: Never exceed the lowest weight capacity of any towing component; i.e. the vehicle, hitch, trailer, etc).This 2-5/16 in. trailer ball features a ball capacity of 25,000 lbs. It features a 1-1/4 in. shank diameter, a 2-5/8 in. shank length, 1 in. of rise and a raw steel finish to protect against the elements. To give you the power you need to tow with confidence, CURT 2-5/16 in. trailer hitch balls are thoroughly tested for safety and meet U.S. VESC specifications.