Griffin Bobbin Threader Cleaner Set - Keep your bobbins clean and thread them easily. This package contains a threader made of high quality spring steel and two cleaners. One cleaner fits the fine-tube bobbins, while the other cleaner fits all other bobbins. Not only does a threader make bobbins easier to pull thread through a bobbin tube, but it also makes pulling rubber legs through cork bodies or threading back material through the fly line to insure a smooth backing to fly line transition.