Best tying tool since the invention of the fly tying vise. Saves a ton of time not having to rewind all the time Lee from a previous post has a problem with the thread going back into the bobbin when he cuts the thread. After you tie off the thread, before you cut it simply pull the thread out until you feel the clutch slip and pull another 3 or four inches and stop. When you lift the bobbin towards the hook, the thread will retract and stop with the 3 or 4 inches you went past the clutch sticking out of the bobbin Use dental floss threaders from the pharmacy to thread your bobbins. If your bobbin has a ceramic tip, squeeze the loop in the threader and push it in from the outer end. If you go from the bottom, it will probably get hung up on the ceramic insert. If you are on a budget get several sizes of white thread and load your spools. Get a set of colored permanent markers. Most of the time the only part of the thread that shows is the thread head or bright spot, so just color the last 8 inches of thread I try to get the students in my classes to at least try my Nor bobbins. A true 5 star product!