D1B-W - Through The Door Mail Drop Box - 1.5mm Steel Payment Dropbox - Door Mount Theft Proof Mailbox - Locking Deposit Drop Box for Night Key, Deposit, Cash, and Rent, Light GraySTURDY MATERIAL: Made of 1. 5mm thick steel, this heavy duty metal lock box is not only long lasting, but also provides great protection for your house mail, letter, envelope, money, check, and keys for business office and home. SAFE & SECURE: Our 12" x 4. 25" x 15'' drop off safe comes with anti fishing design for maximum security. This lockable tamper proof dropbox safe with slot can only be accessed with the designated key, and cannot be pried open