Set of 4 Sheet straps; made of quality Elastic Straps, Wider and Thicker elastic to build stronger and more durable holding system; The Enhanced Built-In Nylon "Clips" and Nickel Plated Clamps to holds the sheets Firmly in Place; The Unique elastic strap stopper to allow Desired Tension; the Adjustable sturdy cord lock to allow desired length; Quality elastic nylon Bedsheet Holders for simple bedside installation; Multipurpose: these Bed Sheet Grippers Work with Not Only Bed Sheets but also Couch, Seat Covers, Tablecloths, Ironing Board Covers, Slipcovers. Set of 4 Sheet straps; made of quality Elastic Straps, Wider and Thicker elastic to build stronger and more durable holding system;