Secure Attachment: The magnet is just powerful enough to hold it on a tool chest; Each tray contains 2 pieces of magnetic bases; Grippy enough not to slide off | Collapsible Design: The magnetic tool tray is foldable to fold and expand, convenient for storage; Add extra storage for objects and discrete parts; Collapse them to be flat when you don't use them to save space | Product Details: Made of silicone with flexible and durable; About 4.5 x 4.5 x 0.75 inch; Expand to 2” and collapse down to 3/4” with enough storage space; Soft silicone trays will not scratched and easy to clean | Widely Applications: Magnets are effective at keeping loose parts together, storing various tools and other small metal parts; Ideal for the DIY project or home repair job; Suitable for mechanics, plumbers, carpenters ect | 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