Features a metal body for durability. Perfect for sharing keys. The wall mount design offers permanent installation. Push button locking mechanism in familiar alpha / numeric telephone keypad format. Easy to use with gloves, by the elderly or by children. Set a 4-character combination for keyless convenience and increased security. Offers over 4,000 combination possibilities. The protective weather cover prevents freezing and jamming; and molded bumper and vinyl-coated shackle prevent scratching. Mounting kit included. Suitable for Indoor & Outdoor Use Large Buttons for Ease of Use Suitable for Indoor & Outdoor Use Large Buttons for Ease of Use