The Thread Director changes the orientation of the sewing machine s spool pin allowing metallic and delicate specialty threads to feed flat into the thread path eliminating twisting and breakage. Adapter fits on most sewing machine s vertical spool pin or bobbin winder. By installing The Thread Director on your vertical spool pin or bobbin winder, the thread remains flat while entering the tension discs eliminating twisting, pooling, breakage and frustration. The end result is a better finished project. Package includes: 1 Thread Spool Adapter. 1 Adapter Base, 4 Nylon Screws. 2 Medium Spool Caps, 2 Small Spool Caps, 1 Instruction Manual.