Yaheetech Nylon Twisted Anchor Line Rope with Thimble-300 Feet 1/2"x300' Twisted Four Strand Nylon Anchor Rope / Boat / Sailboat with Thimble The bitter end of the rope is heat-sealed to prevent unraveling. The breaking strain of this rope is 5850LB Please don't use this for personal safe Best option for knot tying