1Premium Material: This mooring spring is made of marine grade 304 stainless steel, it features durability in the sea water and saltwater environment. 2Shock Absorption: This mooring spring acts as powerful shock absorbers on the mooring warp, reducing the impact load on your boat. 3Fixed Function: These springs, sometimes called mooring buffers, help reduce stress cracking around the cleats and can also be used when anchoring. 4Simple Operation: Mooring springs can be used with ropes. It is recommended that these springs be placed in a straight line, rather than actually cutting the rope, which means that the chain can withstand stress if the spring fails. 5Wide Use: This spring is also a sandbag, hammock, rope, C shaped standing chair, sun shade spring, tightener tightening spring for tarps, tents, and boat mute mooring spring.