The birth of the Intruder was in the Pacific Northwest. It has gone through many evolutions and surely it will continue to evolve, but Jerry's Intruder as it is tied today is a fish catcher. Tied using composite loops, UV materials and a Gamakatsu trailer hook, confidence is high when using this fly. Jerry's Intruder is approximately 3" long. Single Station Intruder is about 2" in length.