1Shock Absorbing: Boat anchor mooring spring designed to prevent your vessel and accessories from shock and pressure while at anchor. 2Reduce Cracking: Stainless steel mooring spring helps to reduce stress cracking around the cleats and can also be used during anchorage. 3Excellent Protection: Mooring spring provides protection for deck fittings from the effects of violent snatching, can be used with ropes or chains. 4Widely Use: Spring is also a sandbag, hammock, rope, C shaped standing chair, sun shade spring, tightening spring for tarps, tents, shock absorbing spring. 5Stainless Steel: Dock line mooring spring made of 304 stainless steel material, with a rubber pad, which has good shock absorption performance.