Drywall anchors provided are pretty small. The instructions tell you to drill a 1/4" hole for them, but that's _almost_ too big, and one of the anchors was pulled right out of the wall while I was screwing the shelf in. I definitely would not trust them with anything heavy or valuable, and I'm going to have to find replacement anchors that actually work with the 1/4" hole the instructions ask you to drill.