Multifunctional: Outer size: 5.66" L x 3.1" W x 9.6" H. This key drop box works great as a secure drop box, donation box, collection box, deposit box, suggestion box or even ballot box. Ideal for home, office and business use High Security: No unauthorized access! Equipped with a simple but safe metal lock, the metal donation box can only be opened with the keys provided. Always keep your contents securely stored to ensure their security and confidentiality Practical Dual Slots: 2 available slots for easy dropping of any item! A long slot (4.3" L x 0.2" W) for envelopes and a square slot (1.96" L x 1" W) for larger items. Perfect for dropping house and car keys, cash, checks, letters, mails, documents, donations or ballots Reliable Construction: Solidly constructed with 0.8 mm thick steel plate, the collection box is robust and unlikely to be pried open to avoid forced entry. And the sloping flip-up cover can effectively block rain and unpredictable water, always keeping the inside items dry and intact Ultra-convenient Design: Greatly optimized connection between the top cover and the back plate. Use flexible piano hinge instead of common screws. You can install it tightly against the wall and open the cover completely without hitting the surface