Highlights Material: The X chock made of45# heavy duty steel material, double stable power, no shaking. Principle: Provides added stabilization and prevents tire shifts by applying opposing force to tandem tire applications. Anti-Theft Combination Lock: Includes high-strength stainless steel combination lock to deter theft. Rust Inhibitive Coating: Increased surface plating process to resist corrosion, increase hardness and prevent wear and aging. Fits: Compatible with most trucks, campers, travel trailers. Details Wheel chock stabilizers are suitable for all trucks, campers, travel trailers, choose our reliable quality, give you peace of mind, enjoy a pleasant journey, start your stable travel life. It is used to lock the tires of the car to prevent the car from slipping on the slope and stabilize the body Carry with the car, easy to install, suitable for installation on various double-axle models." Specifications: Material: 45# steel Surface treatment: blue and white zinc plating Product size: 385*125*81mm Weight: 2.63kg*2/5.8lb*2 Expandable in size from 1" to 10.5" Static height: 3.25 inches Travel: 10.5 inches Maximum load: 450lb" Installation Process: Package List: Wheel chock*2+Wrench*2+Lock*2 Listing and template services provided by inkFrog