STAS Zipper Pro - Picture Hanging Security Hooks for Perlon Cords or Steel Cables or Wires (20) Features a theft-delaying security bracket that also will hold your artwork securely in place Secure and easy to use, position your artwork in an instant Unique patented STAS solution for heavier pictures up to 44 lb (when used on STAS steel cables) Can be used with most picture hanging cords, cables or wires of 1.6 - 2mm thickness (1/16" - 5/64") Will bear loads up to 33 lb when used on STAS perlon cords or up to 44 lb when used on STAS steel cables