The BAL X-Chock Tire Locking Chock provides added stabilization and prevents tire shifts by applying opposing force to tandem tire applications. It works with the tires natural movement instead of against them. It fits even the tightest of applications, retracting down to 1-3/8" and extending to 10". It has a rust inhibitive coating. The plated ratchet wrench has a comfort bumper. It is lightweight and easy to store. An optional Pad Lock (#28015 Sold Separately) can be used for extra security.