Convert-A-Ball System 1 Stainless Steel Shank + 1-7/8 & 2 Trailer Hitch Balls No more wrenches - three interchangeable balls (1 7/8in., 2in., and 2 5/16in.) fit on the 1in. shank The 1 7/8in. and 2in. balls work great on the 3/4in. shank SAE-I684-E Approved V-5 Rated All units shrink packaged for display