provides added stabilization and prevents tire shifts by applying opposing stabilization & performance best seller! extends 10" to 17" to accommodate wide track axle spacing pel belul mireasoverome croce bal av products group includes padlock and 3 keys bag rv products group the universal-fit supergrip chock carry-all helps you organize tear on your chocks by keeping them securely stored and cloth and features a velcro handle wrap eliminates front-to-back rocking motion when applied trailer or 5th wheel tires for added stability secure tandem tires to prevent movement while parked or good sam members save big every day! see page 66 for details