Generally, the breaking strain of the Achor Rope is going to far exceed the holding power of the Anchor. The real test is when the anchor line snags on an object and is exposed to sharp edges. A three-strand nylon rope will be able to withstand some pretty robust treatment, and the three-eights diameter rope can withstand a pull exceeding three-thousand pounds. Make sure that the line comes complete with 316 stainless steel fittings. They are a little more expensive, but there is nothing better to resist corrosion than this grade of stainless steel. Make sure the anchor line you are buying is UV resistant.