I received this as a free gift when I purchased a surfboard. I'm selling it because I don't use it. Here's the manufacturer's description: DESTINATION is a surf accessories brand from California. They support famous California surfers and are committed to design and quality!! With numerous innovative designs, they are loved by surfers not only in California but all over the world. 《Cord Diameter / Length》Small Wave 5.5mm / 6ft [Features] ・Stainless steel is used in the swivel to prevent corrosion. ・Special bartack stitching is applied to the connection between the rail saver and the swivel for increased strength. ・The thickness of the bottom of the mold end connecting the ankle cuff and swivel is reduced to alleviate stress on the ankle. ・A large loop-shaped tab is attached to the Velcro for easy attachment and detachment.