Hanak Slotted Tungsten Fly Tying Beads- Hanak beads are some of the best you'll find anywhere in the world. Beads have multiple purposes on flies, they attract fish by their flash and/or color and their weight enable your nymphs to sink to the fishing zone quickly and help them remain in that zone. Tungsten has a specific weight of 18 kg/dm3, which is nearly twice as much as lead. Therefore, your flies can be slimmer and get to the fishes depth faster. Tungsten nymphs are absolutely essential for fishing in deep pools and fast streams.