Hi there, I use them for some Atlantic salmon patterns that I find "balance" better for lack of better terminology than single ones. For example, I like a Butterfly on a Mustad 3582 #8 or #10 much better and it performs better for me than a single in the same size. I have a few in my box of certain patterns that sink a little better with the double hook (Green Machine and buck bugs for example). They are however, very difficult to get out of a salmon's lip when both hooks are lodged firmly and your barbs are not pinched.

When I teach fly tying every January at our local Fish and Game club, one night we tie all the flies on doubles, there are a few different tricks to do and it shows the new tiers a few points (pun intended)

Donald, I really like that Silver Ghost, those colors would work well for me on my normal fishing waters.

Dwight