See if this photo helps. The idea of this hook combination came about for several reason.
Reduce fouling as Ron said without depending on inverting the hook like a clouser style fly.
Adding additional weight to a fly, so as to minimizing casting distance loss.
Change the effective balance point of the fly in the water, causing a fluttering swimming action.
A different cross sectional hook tying area to make tying flatwings easier. This also give the tier more options of creativity with a flat hook profile.
This method of tying makes it adaptable for shrimp, lobster, flatfish, crab, and squid flies.
Last edited by RayStachelek; 02-17-2002 at 04:11 PM.