This Heavy Duty Anchor Shock is made for larger boats. Using the HD Shock will allow you to let out less anchor rope, making it easier to anchor where you want. There is no need for a huge anchor or chain, a pair of 16 pound river anchors will easily anchor a 20' walleye boat in a serious chop. It's easy to use and can be removed when not in use. Heavy duty shrink wrap covers the stainless steel connecting rings to protect your boat from getting scratched.