My recommendation for assembling this furniture is do not attempt without wood glue. To say the instructions are unclear is an understatement! When hammering in piece number 33203, they must be flush with the wood edge. The directions never mention this. It took me with a helper 3 and a half hours to assemble all the parts of the bookshelf. When the time came to put the shelves into the larger side pieces nothing went in at the same time. Snap in one part the other aligned part comes apart. Hence the necessity for wood glue. This is a very flimsy piece of furniture with very poor instructions. Would not recommend!