For towing and maintenance, CURT wheel chocks are the perfect accessory to keep on hand. Any time you get underneath your car or truck to change oil, perform maintenance or make repairs, chocking the wheels is a vital safety measure. Even if you are just going under the hood to check fluid levels, it is a good idea to make sure your vehicle is not going anywhere. Likewise, whenever your vehicle is hitched up to a trailer and parked for an extended period of time -- whether it be at the campground or the boat landing -- using wheel chocks ensures your towing rig will not be rolling away without you in the driver seat.