Several months back I stopped into Goodwill and found several pairs of these needles there. These needles are all single needles with the plastic cord and a plastic disc attached at the end and they have the 'Boye' name on it. I have these in several sizes but I have NO IDEA what they are called and what they are even used for. I've tried searching but can't find anything. Can someone help me? They were too good of a deal to pass up even though I have no idea what to use them for. The picture of the needle is here:
Any help will be appreciated!