LOVE THIS! Such a cute bookcase. No tools needed! If you are not stacking the bookcase, you don't need one tool at all. If you are stacking, just use the little tool packet included. Other than that, just slide the bookcase out the box, unfold the side eaves to stand it up, then push down the 3 shelves into their brackets to hold them in place. Literally took 3 minutes. Packaged well. So cute!