Provide added stabilization, while preventing tire shifting by applying opposing force to your tandem tires. The X-Chock works with your tires natural movement instead of against them. Fits even the tightest of applications, retracting down to 1-3/8" and extends to 12". Light weight and easy to store, features a rust inhibitive coating and plated ratchet wrench with comfort bumper. For added security, lock with the BAL Pad Lock (92-9047), sold separately.