1、 Safe Attachment: Our foldable tray set uses a strong magnet base to provide a secure fixing for most metal surfaces while fixing the metal parts and tools inside each small parts holder; the non-damaging magnetic screw tray set will not cause damage. 2、 Flexible Magnetic Tools: These magnetic bowls are used to hold nuts and bolts, and can be folded and expanded to increase the depth of the magnetic tray for additional objects or separate parts storage; ideal magnetic tray set for mechanics, plumbers, carpenters, and more. 3、 Silicone Tool Tray Set: Our Magnetic Screw Holder Set uses a magnetic tool tray made of high tensile silicone to ensure this small parts tray set can be used as needed; the magnetic bowl for each screw can resist most Hazardous liquids. 4、 Easy to Identify: This Magnetic Parts Tray Set contains multiple colors for easy color-coding of parts and easy organization to help speed up projects; the tray set comes with blue, orange, green, and red collapsible bowls. 5、 Convenient Storage: Each nut and bolt tray has a compact profile for easy and convenient storage when the foldable headset is not in use; each magnetic bolt tray can be quickly expanded when needed and can hold up to 2 lbs (approx. 90.9 g) tools and parts.