The holes are too shallow. I saw this on an Amazon review so was prepared for it but was disappointed that the issue still exists. I actually broke a screw attempting to force it into the hole. This piece cries out for some glue. Having stuck the parts together it is now considerably more study. I also added a brace half way down at the front and back. I think the baskets would work much better if they sat on top of the guide rails rather than in grooves. The baskets would need to be slightly wider or the unit slightly narrower. I sanded and waxed the grooves to make them slide better. I would have paid more for the above to be included.