I ordered 2 sets in different sizes. The shelves were as I expected. You do need to use a level in installation. You screw in large pegs/bolts & match with the holes in the back of the shelves. They are meant to be screwed into studs. I recommend a drill to make the holes in your wall. I then used a pair of pliers to screw the bolts in.  They are sturdy shelves & exactly what I wanted.