FCS 6' Regular Surf Leash 7mm Cord Thickness: 7mm Wave Size: 2-8 ft Interchangeable smooth rotating nylon cuff and rail saver swivel assembly Machine stainless steel swivels Durable polyurethane cord provides the ultimate in strength, stretch and elasticity Detachable rail saver and cuff Smooth rotating swivel assembly featuring nylon housing and machined brass insert Padded neoprene ankle strap Velcro at cuff and rail saver