The Andersen Rota-Flex Lockout Kit is required when using the Andersen Ultimate 5th Wheel Connection with any Rota-Flex pin box to prevent damage to the hitch or tow vehicle. It also keeps the rubber pad in your Rota-Flex pin box from shifting over time. This kit is designed to fit most Rota-Flex pin boxes. For newer models that need longer steel bars, order the Extended Rota-Flex lockout kit (item 123082).• Mfr. Part No.: 3247• Fits Rota-Flex Box with outside edges from 10-7/8" to 11-5/8"• 13-1/8"L flat bar• 9" boltRota-Flex Lockout Kit includes2 Steel Flat Bars2 Threaded Bolts2 Lock Nuts4 Washers Keeps rubber pad in the Rota-Flex pin box from shifting over time Fits Rota-Flex Box with outside edges from 10-7/8"" to 11-5/8"" | Andersen Hitches Ultimate Connection Rota-Flex Lockout Kit