Know your knots! Learn to tie a sliding Snell fisherman's knot with this free video guide. When tying the sliding snell fishing knot, it's like tying the common snell, but you'll be adding an extra line. The knot is easy to tie provided, of course, you know how to go about making it. For an easy-to-follow, step-by-step overview of how to tie this useful fisherman's knot in a minute's time or less, watch this free video knot tyer's guide.