These are trays and work, but please be aware that the page is false advertising. There’s something like 48 trays displayed in the picture, when the largest set currently available is 32.. so you are NOT getting what Amazon shows. If you view another photo that claims “before and after,” you’ll also see that’s shady because the before has items like a large hand saw one top that on the after picture it’s no where in the picture with the trays!These are very handy for organizing drawers. A little tall for some shallow drawers but they look nice, have a lot of configurations possible. Good purchase, will probably get more.I'm happy with these, but I need more of the small size. I can't find any place to buy just one size.SturdyYou can side lock them: very interesting featureAn easy 4 stars.I recommend it.Great organizers. They connect together if you want them to so it is easy to keep them from rolling around in the drawer or falling over. Strong yet lightweight and match the toolbox perfectly. Highly recommended.My tool box needed some serious organization. It's much easier to find what i am looking for now.Works great for organizing any size tool box drawerItems came cracked