Thread holder hooks compatible with your IKEA SKADIS organizational system! Perfect for capturing thread, and looking sleek while doing it! These hooks can be placed directly above one another to utilize even more of your pegboard space! These hooks are perfect for your office, sewing room, product displays, crafting rooms, and so much more! These hooks can find a home anywhere! Specs: -Each hook can hold up to 5 spools of thread. Thread can be a maximum diameter of 26mm. Thread spools need a minimum diameter of 5mm to slip onto the hooks. -Hooks are 3D printed out of plastic by a small family business in Pennsylvania U.S.