Eliminate the hassle of knot tying! Secure and attach ropes in nearly any configuration with the highly functional KnotBone Knot Replacement. Uses a simple wrap-and-lock principle to keep your line secure, and because there is nothing to untie, you will save time, effort and energy. Fits cord sizes 2mm-3.5mm. 25-lb. weight limit. Available: Per 4, Per 8.