MantaRing - Cable Key Ring with Screw Lock - Strong, Flexible, Waterproof. One Ring for Keys and So Much More (Blue) Strong and secure vinyl-coated stainless steel cable with screw-in lock 6 inches long; 2 inch diameter when closed Safe for aquatic use in fresh and salt water Great for luggage tags, key chains, ID tags Perfect for hiking, boating, swimming, fishing and diving gear Binder ring for papers USB flashdrives Store discount cards Awards, medallions, charms Ski lift tickets Fabric samples Tool holder