The original Klinkhammer was tied by Hans van Klinken in the 1980's. His original version was to imitate an emerging caddis. Since the original tie many other body colours have been reproduced in the his pattern. These colour variations change two things: the look of the fly and the type of insect it is representing. This can then make it an emerging Mayfly. The rubber legs give it a little more life like appearance on river drifts.