The Dritz Bobbin Ring is a useful addition to your sewing kit. Just toss the ring into a bag and carry to your sewing class. This plastic case holds bobbins securely to which they will not fall out, while allowing you to view all the colors at a glance. It is a lightweight ring, which is capable of holding over 20 bobbins at a time. Bobbins can be purchased separately.Details:Bobbins are secure in the ring and will not fall outToss the ring into a bag and carry to a sewing classStores over 20 bobbinsBobbins not includedPlastic case