A leap forward in shock cord technology and versatility. More predictably stretchable and easier to handle. Regular uses 1/4" cord (250 lb. tensile strength) and comes with four nylon hooks, and the Heavy Duty uses 3/8" cord and comes with six rugged, rustproof and adjustable nylon hooks so you can place them anywhere along the cord, and they won’t scratch paint or metal. Create custom shapes for holding awkward items using two, three, or four hooks on one cord.