Tywheel Complete Set #1 - the wheel with four attachments. TyWheel's top and bottom surface provide a magnetically charged work surface to keep up with you hooks, beads, tools, finished flies, or any other tying material. This surface is magnetically charged from a precise layout of magnets within the product that allows you to easily add and remove the various attachments in any order that you desire. Every tyer has different preferences, and with TyWheel, the ability to customize your workstation has a whole new world of possibilities. NOTE: fits vise shafts up to 3/8"