Spool Pin Doilies add a nice touch to your Featherweight! They also help keep your Spool Pin Cover Plate from getting marred from your spool of thread. A nice upgrade from the red felt circle. To apply to the Spool Pin, hold the doily close to the inner hole and apply to the Spool Pin at an angle. It will be a very tight fit so be gentle but firm. You can also moisten the inner circle area firstto make it a little easier. Enjoy!