The Stonfo Dubbing Brush Device is the latest from Stonfo Fly Tying Tools. If you want to build your own custom fly tying brushes this is the device for you. the Stonfo Dubbing Brush Device can be used in any fly tying vise that has a 3/8" stem. It has a cup area called a "niche" for holding the fly tying materials to build your dubbing brush. The platform to lay your materials on is fully height adjustable and has grooves in it to help making the dubbing brushes easier.