So, imagine all the shelving & bookcases & things we put together these days that include those round cogs that must fit into those pre-drilled holes? Now, imagine all those cogs that fall out, loosen up, and NOT hold the product together. The reason why? Apparently, it is because the holes into which the cogs are supposed to fit are drilled too large. NOT THIS PRODUCT! Each section included precision drilling so that each cog fit snugly with no swivel, loosening, or ill-fit. Each peg, perfect fit. Each pre-assembled screw parts, fit precisely. The instructions were well illustrated, and took the assembler step-by-step. Yes, it is the fiberboard that all the assemble-it-yourself kits have these days. Apparently it was made in Britain or Denmark or something, where precision means something. Highly recommended if you are looking for this type of product. No squeaks, the bed fits against this bookcase headboard. Good bargain.