Through-The-Door Key Drop Box Mailbox, Combo Lock, Dark Gray

Through the door key drop box with combination lock keeps mail, keys, and small parcels secure while staying protected from rain. The wide slot accepts envelopes and phones, while anti-fishing baffles help deter tampering. Built from heavy-duty steel with a rust-resistant powder coat, it’s designed for daily use at homes, offices, schools, and workplaces. A clear viewing window lets you check deliveries at a glance without opening the box.

• Delivers rain protection with a front flap, drainage holes, and rubber pads to help prevent damp contents


• Stores more with a 0.59 cu ft box capacity for envelopes, smartphones, and small packages


• Secures contents using a resettable combination lock plus internal metal baffles to reduce fishing attempts


• Shows arrivals fast via a 2 × 4 in viewing window—check status without opening


• Installs easily on doors up to 1.7 in thick with included instructions for quick setup

Keep drop-offs organized and reduce missed handoffs with a locking mail slot that works for keys, documents, and small deliveries. The heavy-duty steel body and scratch-resistant finish are built for high-traffic entryways, while the rainproof flap and drainage details help protect contents in bad weather. Whether you’re setting up a secure key return for rentals or a mail drop for an office, this through-door design adds security without daily hassle. Grab yours today and set your code in minutes.

• Color: Dark Gray


• Material: Heavy-duty steel plate with powder-coated finish


• Product size: 12 × 6.1 × 14.1 in (305 × 155 × 360 mm)


• Input slot size: 1.9 × 10.2 in (48 × 258 mm)


• Viewing window: 2 × 4 in (50 × 100 mm)


• Door/wall thickness compatibility: up to 1.7 in (43 mm)


• Weight: 8.69 lb (3.94 kg)