Steady and Secure: Under-the-wheel chocks provide security, but Nepturnbay X-Shaped RV Wheel Chock Stabilizers go further by minimizing the back-and-forth rocking caused by wheel movements when your RV is parked. Enhanced Stability: Say goodbye to an uncomfortable RV experience or worrying about items tumbling inside. Our x tire chocks brace tandem wheels, providing stability on uneven terrain and preventing rocking motion. Quick Adjustment: Nepturnbay wheel immobilizers are easy and fast to adjust. Unlike most designs, they expand with an impact driver on the front, offering quicker adjustments using any power drill with the included attachment. Rust-Resistant Durability: Crafted from rust-resistant steel, these stabilizers withstand outdoor conditions. The adaptive pedal on each end swivels to conform to tire curves, ensuring a secure grip. Complete Set for Convenience: This set includes two (2) wheel stabilizers, one (1) ½” nut driver, one (1) handle driver, and two (2) anti-theft locks. Packaged in a heavy-duty plastic carrying box for easy storage. (Drill not included.) Important Note: While x-shaped wheel chocks immobilize tires, they should not replace parking brakes or regular wedge-style chocks. Use x wheel chocks alongside regular chocks for a steady, secure, and safe RV camping experience. Nepturnbay X-Shaped RV Wheel Chock Immobilizers are essential RV and camping accessories.