The instructions seems to be wrong - it comes with three different types of screws, but the instructions only list two types of screws. The instructions also tell you to use the shorter ones to attach the top to the base, but they don't reach down far enough to bite into the material and tighten it up. I ended up using the short screws elsewhere on the bench and the longer ones on the top and it worked out pretty well, but the holes on the top are drilled slightly misaligned to where a few of the screws just won't fit in there at all. Which is probably fine, I don't think 8 screws are totally necessary for the top, 6 will be fine, but it just speaks to the overall quality of the bench being average.