Craft with silicones, strong magnets, Could directly attached to metal surfaces such as refrigerators, whiteboard, lockers, clipboard, cabinet Each pen holder features doubl ended silicones rings make marker pen more stable and perfectly fit various pen size Widely used on most smooth item and easy to remove. Suitable for refrigerator stickers, fixed charging cables on desk, organizing and other item weighing For strongest attraction, please that the more area of pen holder is adsorbed on the metal surfaces and sheet Package includes 4pcs pen holder; 4pcs round sheets. Perfect for organizing essential, such as scissor, USB cables