Step-by-step, illustrated "How-to" knot tying guides. Outdoor, Boating, and Paddling Knot cards are the same 20 best rope knots on 6 cards. Packaging differentiates them for different markets. Fisherman's Knot Guide is a 3 card set, featuring illustrations of the 10 most popular knots, that folds out to a 12" ruler. Waterproof.