v921, 3-1/2", black keylocking hasp, designed to secure a wide variety of doors, cabinets, boxes and trunks, hasp only locks using key to prevent lock out, functions as a conventional hasp when key is not in use, corrugated leaf has up to twice the strength of conventional flat leaf, exclusive full-width knuckle design and supporting side walls reduce sag, all components are plated prior to assembly to enhance rust resistance, hold open feature eliminates uncontrolled swinging of leaf, manufactured from steel, visual pac.