Cabinets stack securely and lock together. Can also be wall mounted with keyhole slots. A variety of drawer configurations provide versatile storage solutions. Transparent, clarified polypropylene, unbreakable, dividable drawers offer easy content identification. Finger-grip drawer pulls provide easy access and rear stop tabs prevent contents from spilling. Cabinets have a recessed tray on top. They also have a rear stop feature to prevent spilling. The feature is on the frame, not the drawer. The back of the drawer catches 2 tabs that are molded into the frames. The dividers won't get lost; they are molded into the back of the frame and can be removed from the back if dividers are to be used. The 16 drawer cabinet has 8 dividers. Drawer I.D. small - 2.125" W x 1.5" H x 5.25" L, large - 4.357" W x 2.0" H x 5.25" L.