The Diamond Hook Hone is a small tool that people rarely think to bring along, even though a slightly dull hook is enough to cause you to miss a bite or lose a fish. Its diamond-coated surface is used to sharpen the hook point without having to immediately change your fly or streamer. The guide groove helps maintain the correct angle, especially on the fine hooks used for dry flies, nymphs, or streamers. Its compact size fits easily in a pocket, and the chain keeps it from getting lost at the water’s edge. It’s a simple yet useful accessory for regularly checking your hook points after contact with the bottom, a rock, or a hard bank.