Lippert 191023 JT's Strong Arm Fifth-Wheel Jack Stabilizer Kit Eliminates annoying chassis movement Provides a rock-solid camping experience Dealer installation or do-it-yourself One-time installation/permanently attached Works with most jack applications Bolt-on installation; no welding required If unit has hydraulic jacks, three #314592 jack adaptor lugs are required If unit has electric stabilizer jacks, one #314597 adaptor kit is needed per set of electric stabilizer jacks RV fifth-wheel jack stabilizer kit comes complete with everything needed for DIY installation Designed to eliminate side-to-side and front-to-rear RV movement and shaking; Stabilizer bars form triangles at front and rear jacks to prevent shaking and swaying The kit was designed for installation by your dealer or the do-it-yourself on fifth-wheel RVs with 58 inches or greater distance between the two front landing gear legs