Bought these to balance out a single, off center, and grouted white shelf that came with the apartment, and make more space for a growing pandemic times cooking spice-box! Great! 

Note The plastic anchors, for plasterdrywall mounting, are of a softer plastic and did not do well going into predrilled holes - ended up using my own anchors. Aside from being the softer yellow anchor, the gap after the threads goes high, so there’s little solid plastic to drive it the rest of the way flush with the wall.