Using the iTOOLco JR01 Jack Rack is easy. First, place your sets of Real Jacks and their Axles on the rack. You can load up to 5 sets at once. When you need to move it around the job site, just grab the fixed handle and roll it like a hand truck. It's designed to fit through 30 - inch doorways, so you won't have any trouble getting it where you need it. For maintenance, keep it clean and dry. Since it's made of US steel, it's quite sturdy, but avoid exposing it to extreme weather for long periods. The 6 - year warranty gives you peace of mind, but if you notice any issues, contact our support team right away.