I love these rustic shelves I ordered for my home office.  They are small - really not designed for heavy objects, which I knew when buying.  However, the kit came with these monster size wall anchors and I tried them - they literally just chewed up my drywall so bad that I had to buy a patch kit to fix and the buy smaller more appropriate anchors for these shelves.  Whoever thought these needed monster steel anchors needs to go back to engineering school!