This was not easy to put together. Some of the pre-drilled holes don't line up with the drawer sliders so I was only able to math up two screws instead of three. The casters (which have four screws each) only have one pre-drilled hole per caster and so you have to make the other three holes. You need a lot of different screw heads to put this together since all are different, you also need a lot of patience!