With the advent of loop-to-loop connections from fly to leader, many fly fishers have gotten away from the tried-and-true nail knot. I’ve tried both (and other options), and among them all I find the nail knot to be the strongest connection with the least likelihood to “hinge”. My long-time tool to make tying the nail knot easier was an inexpensive small U-shaped channel that was attached to a nipper. It was great for years in fresh water, but only a year in the salt had the pivoting joint bound up tight in spite of being cleaned and lubed after every trip. I went online to dig up a replacement, and found the Duncan “Tailknott’r”.
Part of being successful at fishing is making sure that you can tie a reliable and strong line to line connecting knot. Nothing is worse than feeling that “Thunk!” on the end of your line and then, just like that…..he was gone, only to reel in a “little piggy” curly Q which will tell you that your knot came undone.