CHAIN UP Weight Distribution Trailer Chain Harness One time set up that stays with the trailer Fits all ball sizes 1 7/8 thru 2 5/16 No More twisting your safety chains Holds chains in a "W" like shape when towing To view insrtuctions go to https://www.youtube.com/channel/UCoX0vwIAOFHlHxFAoZF8eNQ