Know your knots! With this free video tutorial, you'll learn how to tie a double overhand loop knot. The double overhand loop knot is a very quick yet strong knot. 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.