The effortless Norvise Automatic Fly Tying Bobbin is a true marvel that "oeautomatically" rewinds itself, making thread management simple, quick, and efficient. Our bobbin automatically retracts on its own to the correct tying position yet remains suspended from the hook when released. In addition, the Automatic Bobbin works perfectly with the Norvise Fly Tying Vise and Vise Thread Post that comes with the vise.The Norvise Bobbin is the perfect thread-management tool. Whether you are using a Norvise or any other vise, this bobbin will improve, simplify, and speed up your fly tying.