This Product 1) Amazing 2) Complete 3) Amazing.2 Fast things: Air the trail tires first (and up), yes, it works with a bang. (Proper use of the product) Second car borrowed from father-in-law and hissed from the left rear tire with a flat tire. I did indeed check, the valve stem core seemed loose or something like that, wanted to tighten it, no it really was broken. Malfunction. I live far from town so taking it to a tire shop would be a tow or at best a spare tire. This little kit came to mind, went and yes, spare valve cores (comes with 4) were included, used a tool to pull the bad one out, put a spare in, back in business, no air leak. Pumped up a tire and saved a trip to the tire shop, which in most cases would probably have cost more than this kit. So that saved the day. A good kit to take with you on your trip, whether you are an off-road enthusiast or not.