The Master Lock no. 5422D portable pushbutton lock box features a 3-1/8 in (79 mm) wide metal body for durability. The shackle design offers over the door mounting for convenience. Set your own 4 character combination for keyless convenience and increased security. The protective weather cover prevents freezing and jamming and molded bumper and vinyl-coated shackle prevent scratching. The limited lifetime warranty provides peace of mind from a brand you can trust.

• Over the door knob design for portable installation
• Convenient pushbutton locking mechanism in familiar alpha/numeric telephone keypad format
• Set your own combination using up to 12 letters, numbers or both
• Large buttons for ease of use, even in low light conditions
• Large internal cavity and removable key hook prevents jamming
• Protective weather cover prevents freezing and jamming
• Molded body and vinyl-coated shackle prevent scratching

• Instruction/Installation Manual https://assets.unilogcorp.com/187/ITEM/DOC/Master_Lock_100033176_Instruction_Installation_Manual.pdf