Spooler™ Spindles keep thread spools with matching bobbins. Simply push the spools and bobbins onto the flexible spindles and they stay put. Stop hunting for the "right" bobbin or throwing away good thread that you can't identify. Thread ends stay tidy by passing the thread through the bobbin hole and around the spindle into a slot at the top end. Spindles make it easy to manage your thread. 12 Spooler™ Spindles per box.