When it comes to carp flies, Jay Zimmerman's Backstabber is the gold standard. One of the first commercially produced flies designed specifically for carp, the Backstabber is a pattern that can wear many different hats. It can be fished as a leech, a small crayfish, a little baitfish, or even a large insect. Whether you're fishing the DSP or your local carp pond, Zimmerman's Backstabber is a must-have fly.