10 Best Key Lock Boxes 2025 in the United States

The Master Lock Key Lock Box (model 5400EC) is a robust and versatile option for securely storing up to five standard house keys. Made of durable metal, it features a four-digit combination lock that you can reset with thousands of possible codes for personalized security. Ideal for both indoor and outdoor use, the lock box is coated with vinyl to prevent scratches and includes a shutter door to protect the combination dials from weather elements.

The shackle is designed to fit most door knob styles, making it highly adaptable. Measuring 6.25 x 3.25 x 1.5 inches, it is relatively portable and can be conveniently mounted on a door or other surfaces. It should be noted that while the box is weather-resistant, it may not be fully waterproof, so placement in very wet conditions could be a concern.

The capacity, while adequate for most, is limited to five standard keys, which might not be enough for some users with larger key sets. Despite these minor drawbacks, the combination of durability, ease of use, and security makes it a solid choice for anyone in need of a reliable key storage solution, especially for outdoor use or real estate purposes.

The SentrySafe Black Fireproof Document Box is a solid choice for those looking to protect important documents and valuables from fire. Made from durable alloy steel, it ensures that your items are safeguarded, and its fireproof feature is UL Classified to endure 30 minutes at 1550°F, making it particularly suitable for home or office use. The box also includes an ETL verification for protecting digital media such as CDs, DVDs, and USBs, which adds a layer of versatility to its use case.

The key lock mechanism is straightforward and helps keep your documents secure, with two keys included for backup. The box offers a 0.61 cubic feet capacity and fits letter-size hanging files, making it convenient for organizing various documents like passports, social security cards, and birth certificates. However, at 28 pounds, it is relatively heavy, which might limit its portability despite being floor-mounted.

It measures 15.3 inches wide, 12.1 inches deep, and 13.6 inches high, so it offers ample space without being too bulky. One notable drawback is that it lacks water resistance, which means it won't protect your documents in case of flooding or water damage. Additionally, the black color and basic design might not appeal to those looking for a more stylish or visually appealing option.

The Master Lock Digital Lock Box is designed to securely store keys and access cards, making it particularly suitable for vacation rentals like Airbnb and VRBO, unmanned locations, and real estate use. One of its notable strengths is the ability to share access via Bluetooth and keypad codes, allowing flexibility for both temporary and permanent access. This is especially useful for managing multiple guests or service personnel without needing physical keys. Additionally, it offers a large internal capacity, ensuring you can store multiple keys at once, and it is weather resistant down to -40°, making it durable for outdoor use.

On the downside, some users may find the reliance on a battery for operation a drawback. The lock requires a CR123A battery, which needs to be replaced periodically, although it does come with one included. The lock box is also slightly larger than some might expect, measuring 3-1/4 inches wide, which could be a concern for those looking for a more compact solution.

If you seek a reliable and user-friendly solution for key management, especially in rental or real estate scenarios, the Master Lock Digital Lock Box is a compelling option. Just be prepared for the need for battery replacements and some potential learning curve with the app functionalities.