This is a really handy item to climb onto the van roof. It can be easily attached to a suitable door hook. It folds conveniently for compact storage. It supports a lot of weight. It's rated at £400 and had no problem supporting a £250 friend who tried it. However, I would warn people if they use it. It's a very small step, it's hard to put both feet on it to get up. It's also a bit slippery. I'm considering wrapping it in traction tape to give it a better grip. It also wobbles a bit when you use it. When mounted on my van it's about 3.5 feet off the ground so I get a little nervous stepping and standing on it. It helps you a lot to get on the roof of your car, but be sure to use it. carefully. It would be frustrating to slip and fall from it - at that point it becomes a dangerous solid object that sticks out if your body falls on it. Great tool, but use with care!