Coats and Clarks does not make the 'notched' spools anymore. It is simply twisted under the plastic rim. If you do have an older version, you have a couple options. Put the 'notch' at the top and the thread will not get caught (if you have a horizontal holder, put the notch to the far side). You can also use a TINY bit of nail polish to fill in the notch - emphasize TINY.