Trailer tires spend all their lives sitting on the ground with weight pushing down on them, which is why most trailer tires fail prematurely! Give your trailer tires a much needed rest by lifting and supporting them off the ground with TrailerLegs! Designed to lift most trailers up off of their tires by using a tow vehicle to push or pull! Place 2 TrailerLegs/1 axle set under each axle of your trailer, and position the included Assist-a-Lift blocks in front of each tire(may not be necessary on trailers with axle ground clearance of 12" or higher) in a triangle orientation with inner hole pointing away from tire(see pictures on ad) using your tow vehicle push or pull your trailer up on TrailerLegs. Using on gravel or loose surfaces or you have a trailer with lower axle(s) or a heavy trailer, first pull your trailers tires up on plastic stacker blocks or 2x4 chunks(not included), then position TrailerLegs and pull up from there. Even inexpensive tires can last longer when maintained with TrailerLegs! Use when camping or living in your trailer for maximum stability! Our phone and email are always on, please feel free to call or write with any questions you have about TrailerLegs. Thank you.