The Master Lock 5415D Heavy Duty Key Lock Box features a 105mm wide metal body for durability and accepts multiple house keys and access cards. Stop hiding your keys under the doormat or under a flower pot. The wall mount design offers permanent installation. Set your own 4-digit combination for keyless convenience and increased security. The protective cover protects combination dials from weather, dirt and grime. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust.