【Material】- Bobbin wider is made of sturdy plastic, durable and not easy to break. Save your time to organize your remining threads after a project by using bobbin winder than by hand. Bobbin rings are made of stainless steel, sturdy to use. 【Easy To Use】- To use a bobbin winder, first remove the pin that holds the bobbin. Insert a floss bobbin into the slot, align the hole on the bobbin with the hole in the winder. Reinsert the pin to secure the bobbin. Perch the bobbin winder upright on the edges of a standard plastic bobbin box and you are then ready to wind the thread. 【Time & Effort Saving】- Bobbin winder can help you organize threads and embroidery floss in much time and effort saving way. Use this bobbin winder and bobbins to keep your threads neat and tidy. 10pcs floss Bobbin rings helps you to store and classify thread. 【Package Included】- 1pc bobbin winder + 10pcs floss bobbin rings