The Mobile Outfitters Inc Lippert Components 314594 JT's Strong Arm Stabilizer Replacement T-Bolt JT's Strong Arm T-bolts tighten the jack stabilizers when in travel position and lock them down when in camping position, but must always be loosened when raising/lowering jacks Replacement T-bolts for tightening any JT's Strong Arm Jack Stabilizer kit systems 2 per package Easy do-it-yourself installation For use only with JT's Strong Arm Jack Stabilizers