I know this is a quilting forum but recently I bought a sewing basket at a yard sale that had a variety of hobby items in it. Among the treasures were various knitting needles. Can anyone tell me about 2 needles that appear like a circular needle? --poly fiber with the skinny shaft-- but there is a circle on the end instead of going all the way around to the other needle. This isn't clear at all but hope someone knows what I'm trying to explain and knows how these needles are to be used. They were made by Bates but I can't find a picture online. Is there a special use or are these simply a pair of needles that are not aluminum?