Ya know… I was angry that I spent 80 on these steps when I realized that they are cheaply manufactured. I’m giving it 4 stars because I’d buy them again ￼for the pets to use them. They serve the purpose I bought them for. Assembly was very easy with a drill. With a screwdriver it will take a while. . Having someone help you assemble will go even quicker. Just make sure it’s someone that makes these things easy, not someone you fuss with , it’s not worth the fuss. The dowels DID NOT fit the holes they’re meant to — use wood glue for extra hold. There is not an interior to the steps. Just hoping they hold up.