●X-TYPE WHEEL STABILIZER - Provides added stabilization and prevents tire shift by applying an opposing force to the two tires. Extends from 2" to 10". Universal fit for tandem axle campers, RVs, trailers, etc. ●DURABLE RUST-PROOF COATING- High quality anti-rust coating with comfortable anti-slip handle silicone sleeve. ●UUPGRADED WITH BUILT-IN WRENCH DESIGN - Easy operation with no extra tools required. Center axle design that opens and closes both sides at the same time, making setup 10 times faster than others. ●ANTI-THEFT COMBINATION LOCK - Includes High-strength stainless steel combination lock to prevent theft.(NOTE# follow the locking method to ensure that it will not loosen as picture 6 showing.) ●ADDED STABILIZATION - Textured grip to increase friction, Eliminates front-to-back rocking motion