Master Lock 5400D Set Your Own Combination Portable Lock Box

Description Over the door knob design for portable installation Large internal cavity prevents jamming, even when holding multiple keys Set your own combination convenience for optimal security Set your own 4-digit combination for keyless convenience and increased security Protective weather cover prevents freezing and jamming Molded body and vinyl coated shackle prevents scratching Internal Dimensions: 3-1/2″ (89mm) H x 2-3/4″ (70mm) W x 1″ (25mm) D