Almost durable. This is the easiest way to level a caravan/motor home/motor home. Single or double axis. I use one on my 21ft trailer, my brother in law uses it on his 35ft fifth wheel. So easy to use. You can't guess how many yellow/orange Lego bricks you need to build the stairs with. You can use the stabilizer. Much stronger than plastic. Sometimes it can slide if the ground allows it - sometimes gravel or concrete. Easy to prevent. I love this shop!