I've heard it called the rattler or rattlesnake, but I can attest this articulated pattern works well for steelhead. You can easily manipulate the weight of the fly by the type, size and number of beads on the loop. Instead of wire or mono, I've used braided line like spiderwire. A general step by step is below from a quick google search. I usually just tie a bunny body, tail, and a little flash. As with bunny leeches, you can get creative with the color combos.

Have you thought about tube patterns instead of articulated? Just curious.

http://www.taneycomotrout.com/howtotierattlesnake.html