Provides added stabilization and prevents tire shift by applying opposing force to tandem tire applications. As opposed to other chocks, the X-Chock works with the tires natural movement instead of against them. Fits even the tightest of applications retracting down to 1-3/8 in. and extends to 10 in. X-Chock has a rust inhibitive coating, lightweight, easy to store. and a plated ratchet wrench with comfort bumper is included. Lockable for added security with pad lock.