RV Trailer Stabilizer System for 5th Wheels and Travel Trailers - 4 Foot Plates Made in USA System Stabilizes a Parked Travel Trailer or Fifth Wheel Trailer Trailer Must Have 4 Jacks, 2 front and 2 Rear for the system to be installed. Includes the two required Foot Plates plus two additional so all jack footplates will match. Installs Permanently so there is nothing to setup or store. Approximately 2-3 hour install.. Works on both 5th Wheels and Travel Trailers with existing stabilizer jacks. Power Leveling systems require a different kit. Eliminates Need for Tripod. Between Wheel Chocks, and Slide Out Jacks