Highlights:1.Rainproof Design: Our through the door key drop box features a safety rainproof design with a large shield placed in front of the delivery slot, ensuring the security of important mail even during heavy rainfall. The bottom of the box is equipped with rubber pads and drainage holes to quickly remove accumulated water, preventing mail from getting wet.2.Large Storage Box & Slot: The through the door drop box includes an 12616 inch storage box, providing 0.51 cubic feet of space, capable of accommodating various sizes of items. The 9.81.8 inch large slot is suitable for smartphones, envelopes, small parcels, and keys.3.Durable Materials: Constructed from heavy-duty steel and coated with rust-resistant powder, our the through the door mail box is sturdy and durable. Its scratch-resistant surface design maintains an attractive appearance and enhances longevity. This mailbox ensures long-term wall security and usage life, providing peace of mind for your daily life.4.Key Lock for Security: The key lock protects your mail privacy, coming with 2 keys for convenient access by you and your family. Inside the mail drop box, there are metal baffles to prevent theft or fishing for important mail. Its ideal for use at home, offices, workplaces, or schools.5.Easy Installation: Our mailbox is designed for doors with a thickness of 1.7 inch/43mm and is compatible with various common door types. The door-mounted mailbox is easy to install without complex steps, and it comes with detailed installation instructions, making it suitable even for beginners.Details: Rainproof Flap You can confidently rely on our through the door key drop box with its unique rainproof flap, acting as a sturdy guardian to keep storms at bay and ensuring your mail remains protected.Spacious SlotMail comes in various sizes, but our wide 9.8x1.8 inch slot of through the door drop box accommodates everything from large parcels to small cards with ease. Whether its envelopes, keys, remote controllers, or rental checks, everything fits effortlessly.Heavy-Duty Steel ConstructionCrafted from heavy-duty steel and coated with powder for added protection against rust, our through the door mail box ensures long-lasting durability and resistance to corrosion. The powder-coated finish enhances its durability, maintaining an attractive appearance over time.Easy InstallationOur key drop box design considers every detail, making installation a breeze. Simply mark and open the installation holes on the wall, mount the delivery slot on the door, insert the mailbox into the door, and install it. Finally, reset the password, and your mailbox is ready to go!Multiple Considerate DetailsEquipped with two keys, allowing you to maintain control over the security of your drop box at all times. The unique serrated design effectively prevents thieves from prying or damaging the mailbox. With thickened double-layered doors and an accompanying waterproof rain cover.