Jumbo BobbinSaver? is a larger version of our well known BobbinSaver, which stores sewing machine bobbins together for easy retrieval. Made of the same flexible plastic, the new big size expands to fit snugly around metal or plastic bobbin measuring at least 1 1/16" in diameter. This accommodates the Series 7 and 8 Bernina bobbins as well as some other industrial machine bobbins. Bobbins are held securely and threads will not tangle or unwind.