Stonfo Elite Disc Drag Bobbin Holder, a top quality weighted stainless steel bobbin holder with quick adjusting disc-drag permit a perfect thread tension. This machined Stonfo Elite Disc Drag Bobbin has a hardened steel tip insert and countersunk feed that will allow thread to glide through the tube for threading and tying. The bobbin drag control has a large adjustment zone for fine tuning thread tension to your personal liking. Suitable for different sizes of spools. (Thread not included). The Stonfo Elite Disc Drag System bobbin holder is a top quality weighted stainless steel bobbin holder with quick adjusting disc-drag system which allows for perfect thread tension with a hardened steel tube to prevent fraying.Stonfo Elite Disc Drag System bobbin holder review December 2010 issue of the "Trout & Salmon" magazine in "Tackle Shop" - "Fly Tying" section."The machined and weighted bobbin holder has a hardened steel tip insert to prevent fraying and wear and a countersunk feed that allows your tying silk to glide easily through the tube when threading and tying. It also has excellent tension control, which is easily adjusted to suit the strength of your thread. While being suitable for different sizes of spools this holder will take a little longer to swop threads but it will, when properly adjusted, protect the finest of silks from the heaviest of hands. To fit a bobbin, unscrew the tension adjuster and the neighbouring end spooler. Pop the bobbin on (take off any labels), re-fit the end spooler and tension adjuster, set the desired tension and away you go."