Great storage system! Huge selection of drawers and organizers. The size 450 box is very convenient for storing and transporting large tools, such as a hammer drill, screwdriver, grinder, etc. Compatible with other boxes in the ONE size range. I really liked the locks and the quality of the material of the product. You can stand up and sit on it. Nothing will break or bend. I have ordered several more boxes of this system. I recommend!