This is a very good quality hanging storage tray system and it fits perfectly in my Chevy van. it includes holes connected to existing metal shelving but I connected mine to some plywood on the back of the Cargo door. The trays could be a little more sturdy but they lock securely and the side sliding locks are a good feature.This is a very good shelving and storage tray unit and more affordable than Stuff made by American Van and other big companies