For many anglers trying to get aftermarket spare spools for reels from other manufacturers can be expensive and thats if spare spools are even available. This simple Virtuoso Drag Knob eliminates this problem. It will make reels from other manufacturers Virtuoso compatible, meaning you can use the full range of Virtuoso spools on your current reels. This will dramatically cut down on the costs and time required to find and buy aftermarket spools.