Awesome shelves, supper strong; I fix small engines on the side and one unit can hold a lot. I currently have a few generators and big gas water pumps on it and it carries it no problem (few hundred pounds on each shelve), no bending or sagging shelves. It is much more clean looking and sleeker then my old home made wooded shelves. They make smaller and skinnier ones too if you don't have the room, I have a two of the smaller ones in my basement for storage. No more of the bulky wood or wobbly plastic shelves anymore, I will be sticking with these. Also easy and quick assembly, no tools needed. [This review was collected as part of a promotion.]