Specification Brand : ROBLOCK BulletPoint1 : ANTI-THEFT FUNCTION: The wheel chocks for travel trailers comes with anti-theft lock hole, more anti-theft and security, you can free to choose whether to use it. NOTE: Lock not included, need to buy less than 5mm diameter lock. BulletPoint2 : EFFICIENT WRENCH FOR FASTER SPEED: Package contains a multifunctional wrench is regarded convenient camper accessories for travel trailers. And upgraded integrated screw of this wheel chock, its adjustment is more efficient and stable than traditional splicing screw, save your time and energy better. BulletPoint3 : WIDELY USED: The rv stabilizer has an adjustable range of 4" to 10.2", widely suitable for different models of campers, RVs, trucks, travel trailers, and so on. BulletPoint4 : STURDY & DURABLE: X-shaped design of this x chocks wheel stabilizer, connections made with care and attention to every detail. Made of selected high-quality steel, coated with a protective layer on the surface to prevent rust, more robust and durable. BulletPoint5 : ENHANCED ANTI-SLIP: the carefully designed holes on the rv wheel chock, enhanced wheel chock and wheel friction, make more effective anti-slip, provide unrivaled safety for your use. Color : 579-2PCS ItemName : ROBLOCK 2 PCS Lockable Anti-Theft Wheel Chocks RV X Stabilizer for Travel Trailers, Camper Chock Accessories with Wrench, Easy to Install and Remove(4 "-10.2") ItemPackageDimensions_Height : 38.2778 centimeters ItemPackageDimensions_Length : 13.8938 centimeters ItemPackageDimensions_Width : 27.0002 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : automotive-wheel-chocks Manufacturer : ROBLOCK ModelName : RBTS579 ModelNumber : RBTS579 NumberOfBoxes : 1 PartNumber : RBTS579 ProductDescription : RBTS579 SupplierDeclaredDgHzRegulation : not_applicable WarrantyDescription : 60 Days Money-Back