Secure Attachment The magnet is just powerful enough to hold it on a tool chest; These soft silicone trays will not scratch paint and are grippy enough not to slide off Collapsible Design The magnetic tool tray is foldable; easy to fold and expand; add extra storage for objects and discrete parts; Collapse them to be flat when you dont use them; they dont take up hardly any space Identifiable Colors The set of trays comes with blue; green; and red collapsible silicone bowls; These three compartments keep parts separated and organized; which will help speed up projects Widely Applications Magnets are effective at keeping loose parts together; and securely keep your fasteners and parts in place; making them ideal for the DIY project or home repair job Size Details The tool tray organizer is about 4.5 x 4.5 x 0.75 inches; Easily expands to 2 and collapses down to only 34; with enough storage space; proper for you to store your various tools and other small metal parts