No documentation. Installation is difficult, in fact I can't figure out how to do it. Other reviewers are correct about that. I see that if I could in fact install it, it would be in the way of sitting on the walker if I put it on the inside, and it would stick out too far if I put it on the outside. It's cheaply made and would break right away. It's not worth $5, let alone nearly $30. I'm sending it straight back.