Chock-N-Lock is an easy to use device designed to chock, lock and stabilise your dual/tri axle RV or trailer.Completely manufactured in Australia using the highest grade materials. With added ultraviolet protection and glass reinforcement, allowing for the maximum strength, hardness with low friction giving performance gear movements. All this with the benefit of being compact lightweight and extremely easy to use. With adding or removing the Chock-N-Lock extension plates, you can increase or decrease the fitting distance, allowing for more dual axle wheel applications. Features and Benefits:Heavy duty reinforced constructionExtension plates can be added or removed depending on wheel spacingIntegrated locking cap allows fitment of optional padlock (padlock not included)Revolutionary ergonomic mechanism for easy fitmentExpandable with extension plates (2x included, additional pairs sold separately)Can be an aid for correctly positioning your RV/tow trailer, by locking one set of dual axle wheels together you are able to pivot your RV/tow trailer on the same spotCompletely chocking both dual axle wheels of a RV/tow trailer with a single device, preventing movement even when detaching and reattaching to your vehicleEnhancing security with the added inclusion of a wheel locking system that will take a standard padlockOnce attached will improve the stability and "see-sawing" action of dual axle of RV's, travel trailers, toy haulers, 5th wheelers, park trailers, hybrid trailers and general purpose trailers Specifications:For wheel span 144 mm - 199 mm3 Year WarrantyAussie Made What is Included:1 x Chock-N-Lock Important Information:Not what you are looking for? Check out our full range of Chocks & Stabilisers here.