Used this kit to attach wood to my garage wall. It works perfectly (much better than the shelves it replaced), but when assembling it I was concerned that the bracket's bottom screw would need to screw into a plug at the bottom of the rack, rather than just an empty rack, as is the case with the case with the top bolts (they were also closer to the edge than I'd like, but not close enough to think it's unsafe. But your mileage may vary!) It should be clear in the instructions that this is intentional (I assume!) . That's so little that I'm not deducting a star for it.