Know your knots! Learn to tie a Penborthy friction knot with this free video guide. Tying a penborthy knot will vary depending on how much weight the knot will support but this video should give you a good sense of what it is you'll need to do. 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 climber's knot in a minute's time or less, watch this free video knot tyer's guide.