Looking for a secure, convenient way to store keys or grant access without handing out duplicates? This article compares five top lock box options that are ideal for homeowners, landlords, real estate agents, and property managers. Each pick offers a unique balance of security, installation flexibility, and ease of use, helping you choose the best fit for your needs. Read on to understand who each product is best for and why it stands out.
Product Comparison at a Glance
| Product | Best For | Key Benefit | Limitations |
|---|---|---|---|
| Master Lock Key Lock Box 5400D | Homeowners and tenants | Resettable 4-digit code; weather resistant | Portability means possible misplacement if not secured |
| Puroma Key Lock Box (1 Pack) | Office or apartment sharing | Two installation options; strong aluminum/steel build | Shackle removal may require checking packaging |
| Puroma Lock Box (Wall Mount & Portable) | Realtors and on-the-go access | Detachable shackle; 10,000 code combos | Requires proper mounting to avoid tampering |
| Master Lock 5422E Outdoor Key Lock Box | Tenant management and listings | Large capacity; weather cover | Some door styles may require fit verification |
| Puroma Lock Box (Large, 1 Pack) | Emergency access planning | Easy two-install options; resettable code | Bulkier size may not suit smaller entries |
Master Lock Key Lock Box for House Keys – 4-Digit Code, Outdoor

The Master Lock 5400D provides secure spare key access for up to five keys in one durable metal body. It uses a resettable four-digit combination, allowing thousands of personalized codes for flexible access without distributing physical keys. The weather-resistant construction includes a protective shutter door and a vinyl-coated shackle to minimize surface scratches, making it suitable for outdoor use. Best for homeowners who want a single, trusted code shared with family or trusted service providers. A potential limitation is that a loose or forgotten code could complicate access; ensure codes are recorded securely.
Puroma Key Lock Box (1 Pack) – Wall Mount or Door Knob

The Puroma 1-pack lock box offers two installation methods: a removable shackle for door knob hanging or wall mounting with screws and expansion plugs. Its aluminum alloy and steel construction provide rust resistance and tamper resistance for key storage. Pre-set to 0-0-0-0, it’s easy to reset to a new four-digit code with 10,000 possible combinations. Best for office or apartment sharing where a flexible, simple mounting solution is needed. The detaching shackle requires locating the lock box’s release mechanism to access the box for code changes.
Puroma Lock Box with Wall Mount & Detachable Shackle

This Puroma lock box emphasizes security with a detachable shackle and a robust aluminum alloy shell. It features a 4-digit resettable code with 10,000 combinations, making unauthorized access challenging. Two installation options—wall mounting and door-handle hanging—provide flexibility for various entry configurations. Best for real estate agents or landlords who need portable yet secure key storage. A potential limitation is ensuring the shackle remains properly secured after installation to prevent tampering.
Master Lock Black Outdoor Key Lock Box – 5 Keys, 2 Pack

The 5422E model offers a large capacity to hold up to five keys with a weather-resistant metal body and a vinyl-coated shackle to protect exterior surfaces. It uses a set-your-own alpha/numeric combination and features an outdoor-ready construction with a weather cover for the combination buttons. Best for tenants, guests, or clients where multiple user access is needed and outdoor installation is expected. A caution: verify the door knob style compatibility and ensure the unit is mounted on a secure surface to prevent removal.
Puroma Lock Box – Large, Portable and Wall Mountable

This large Puroma lock box is designed for broader emergency access planning with two installation options: wall mounting or door-handle hanging. It takes advantage of a 4-digit resettable code with 10,000 combinations for secure access. Best for property managers managing multiple addresses or for temporary housing setups where quick, remote key sharing is needed. Limitation: its larger size may not be ideal for compact entryways where space is at a premium.
Buying Guide: What to Consider When Choosing a Key Lock Box
Purpose and environment: Decide if you need indoor or outdoor use, or both. Outdoor models require weather resistance and protective features for dials.
Security level: Look for a strong metal body, rust resistance, a reliable shutter door, and a robust locking mechanism. Consider the number of keys you must store and the possibility of tampering.
Installation flexibility: Favor lock boxes with multiple mounting options—door knob hanging, wall mounting, or both. Detachable shackles improve portability but may add complexity.
Code management: A resettable four-digit code provides many combinations, reducing the risk of code reuse. Ensure the reset process is straightforward and well-documented.
Size and capacity: If you store many keys or larger sets, verify the internal capacity matches your needs. Some models accommodate up to five keys; others may offer larger compartments.
User access: If multiple people require access, consider the ease of sharing or rotating codes. Transparent, simple code changes help reduce confusion.
Frequently Asked Questions
- What is the typical capacity of most lock boxes? Most common models hold up to five keys, suitable for small to medium key sets.
- Are these lock boxes weatherproof? Many outdoor models feature weather-resistant bodies and protective shutters, but always check product specs.
- How secure is a 4-digit combination? Four-digit codes offer thousands of possibilities, but security also depends on mounting, exposure, and code secrecy.
- Which installation option is best for real estate use? Wall mounting plus a detachable shackle offer flexibility for portable staging and multiple listings.
- What should I consider when choosing between two-pack and single-pack options? Two-pack solutions are useful for multi-location access, while single packs are ideal for a single entry point.