Pro-Knot Outdoor Knot Cards – The Original Waterproof Knot Reference This six-card set covers 24 essential knots with step-by-step illustrations that are clear, durable, and easy to follow. Each card is made from solid waterproof plastic and held together with a rustproof brass grommet, so they’ll last through years of adventures. With over 1.5 million sets sold, Pro-Knot is America’s most trusted knot reference. Our Outdoor Knot Cards are compact, waterproof, and built to go anywhere—whether you’re lashing down a kayak, hanging a tarp in camp, docking a boat, or teaching a scout troop. Clear, step-by-step illustrations make learning simple for beginners and provide a quick reference for experienced knot users. A bonus mini carabiner is included, so you can clip your knot cards to your pack, boat bag, or keychain and always have them close at hand. Details: Waterproof, solid-plastic cards with no-rust brass grommet 6 cards / 12 pages featuring 23 essential knots Includes mini carabiner for easy carry Size: 3.5" x 2.25", weighs less than 1 oz. 23 proven, practical knots: Bowline, Square Knot, Water Knot, Rolling Hitch, Clove Hitch, Sheet Bend, Double Sheet Bend, Trucker’s Hitch, Cleat Hitch, Buntline Hitch, Prusik Knot, Butterfly Knot, Half Hitch, Two Half Hitches, Constrictor Knot, Tautline Hitch, Double Fisherman’s, Figure Eight, Bowline on a Bight, Stopper Knot, Slippery Half Hitch, Timber Hitch Designed in Bend, Oregon. Trusted worldwide.