Best Key Lock Boxes
Quick answer
For most buyers, the Master Lock Portable Key Lock Box 5400EC is the top choice thanks to its simple resettable dial and weather-resistant build for a single entry point.
Why trust ToolBuyerHub
- Cross-checked manufacturer-published specifications before writing any recommendation
- Verified US market availability and configuration for every model discussed
- Owner-feedback themes are summarized as feedback, never presented as our own hands-on testing
- No invented star ratings; see the visible Research Score criteria on this page
- Checked specifications against manufacturer documentation before publishing
Research updated September 2026.
What Matters Most for This Category
The most important factors when choosing a key lock box are the mounting style, how many keys it needs to hold, and whether the unit is rated for outdoor exposure. Single-unit boxes work well for one household, while multi-packs make more sense for landlords or property managers handling several doors, and a wall-mounted safe style offers a more concealed alternative to a hanging shackle box.
| Model | Best for | Key specs | Research Score |
|---|---|---|---|
| Master Lock Portable Key Lock Box, Combination Lock Box Holds 5 Keys 5400EC | Best Overall | Master Lock, Price varies | 90/100 |
| Master Lock Portable Key Lock Box, Combination Lock Box 5-Pack 5400EC5 | Best Value for Multiple Properties | Master Lock, Price varies | 87/100 |
| Puroma Key Lock Box for House Keys Combination Lockbox with Code, 1 Gray | Best for Everyday Home Use | Puroma, Price varies | 85/100 |
| Puroma Key Lock Box Outdoor 4 Digit Code Combination Lockbox House, 1 Gray | Best for Outdoor Durability | Puroma, Price varies | 82/100 |
| Master Lock 5-Key Combination Safe Black/Silver 5401D | Best Wall-Mounted Safe Style | Master Lock, Price varies | 80/100 |
| Puroma Key Lock Box Outdoor 4 Digit Code Combination Lockbox House, 4 Gray | Best for Multiple Locations Outdoors | Puroma, Price varies | 78/100 |
| Master Lock Portable Key Lock Box, Combination Lock Box 2-Pack 5400EC2 | Best Starter Pack | Master Lock, Price varies | 75/100 |
Master Lock Portable Key Lock Box, Combination Lock Box Holds 5 Keys 5400EC
Best OverallPros
- Weather-resistant metal body designed to hold up to outdoor exposure
- Resettable combination dial removes the need for a physical key
- Compact shackle-mount design fits on a door handle, railing, or fence
Cons
- Only one combination code, so it is not ideal for tracking multiple users
- Limited interior space means it suits a small key ring rather than bulky fobs
The Master Lock 5400EC is a single portable lock box built to hold a handful of keys behind a resettable combination dial. Its shackle attaches to fixed structures like a railing or door handle, making it a straightforward option for a single property.
Master Lock Portable Key Lock Box, Combination Lock Box 5-Pack 5400EC5
Best Value for Multiple PropertiesPros
- Five identical units cut the per-box cost compared to buying individually
- Each box has its own resettable combination for separate locations
- Same weather-resistant build as the single-unit version
Cons
- A 5-pack is more than most single households need
- Managing five separate codes across properties takes extra organization
This listing bundles five of Master Lock's 5400EC combination lock boxes into one purchase. It is aimed at property managers or agents who need to secure keys at several addresses without buying units one at a time.
Puroma Key Lock Box for House Keys Combination Lockbox with Code, 1 Gray
Best for Everyday Home UsePros
- Simple set-your-own combination for quick access without a spare key
- Gray finish blends in against common door and fence colors
- Lightweight body is easy to install without special tools
Cons
- Plastic-leaning construction may feel less rugged than metal alternatives
- Single-unit purchase, so it only covers one location
The Puroma Key Lock Box for House Keys is a combination lockbox meant for everyday residential use, letting family members or trusted visitors retrieve a key without carrying one. It comes as a single gray unit sized for a small set of house keys.
Puroma Key Lock Box Outdoor 4 Digit Code Combination Lockbox House, 1 Gray
Best for Outdoor DurabilityPros
- 4-digit code entry allows for a more customizable combination
- Marketed design geared toward standing up to outdoor weather
- Wall or fence mounting keeps it fixed near an entry point
Cons
- 4-digit mechanical dials can be slower to operate than app-based smart locks
- As with any outdoor box, prolonged sun and rain exposure will show wear over time
This Puroma outdoor lockbox uses a 4-digit combination system and is built for exterior mounting near a home's entry. It is sold as a single gray unit intended for house key storage outside.
Master Lock 5-Key Combination Safe Black/Silver 5401D
Best Wall-Mounted Safe StylePros
- Black and silver finish gives it a more secure, safe-like appearance
- Combination safe format instead of a simple shackle box
- Holds up to five keys behind one dial mechanism
Cons
- Bulkier profile than a basic portable lock box
- Fixed installation is less convenient for temporary or one-time use
The Master Lock 5401D is a combination safe styled in black and silver, designed to store up to five keys behind a dial lock rather than a hanging shackle. Its safe-like housing suits a more permanent mounting spot.
Puroma Key Lock Box Outdoor 4 Digit Code Combination Lockbox House, 4 Gray
Best for Multiple Locations OutdoorsPros
- 4-pack covers several doors or properties in one order
- 4-digit code entry on every unit for consistent operation
- Outdoor-oriented design matches the single-unit Puroma model
Cons
- Buying four at once is unnecessary for a single-door household
- Keeping four separate codes straight requires a tracking system
This listing bundles four of Puroma's outdoor 4-digit combination lockboxes for buyers who need to equip more than one door or building. Each gray unit works independently with its own code.
Master Lock Portable Key Lock Box, Combination Lock Box 2-Pack 5400EC2
Best Starter PackPros
- Two units let you cover a front and back entry from one purchase
- Same resettable combination dial as Master Lock's single unit
- Shackle mount design keeps installation simple
Cons
- Not enough units for larger multi-property needs
- Smaller pack size means a higher per-box cost than the 5-pack
The Master Lock 5400EC2 pack includes two of the brand's portable combination lock boxes, giving buyers coverage for a couple of doors or a small rental setup. Each box operates independently with its own resettable code.
Who Should Avoid the Top Pick
Buyers who need to track individual access codes for many different people, or who want smart, app-based entry logs, may find a basic combination lock box too limited since most models share a single code among everyone who uses it. Anyone needing tamper alerts or usage history should look at electronic smart locks instead of a mechanical combination box.
Before You Buy
Before buying, confirm how many keys the box needs to hold, where it will be mounted, and whether it will be exposed to weather, since these details determine whether a compact single unit, a multi-pack, or a sturdier safe-style box is the better fit. It also helps to decide in advance whether one shared combination is acceptable or whether separate boxes per user are needed.
FAQs
Which key lock boxes are best for comparison?
For side-by-side comparison, the Master Lock 5400EC and Puroma outdoor lockbox are the two most directly comparable single-unit options, since both use a resettable combination and shackle-style mounting.
Which key lock boxes are best for buying guide?
For a general buying guide, start with the Master Lock 5400EC for single-door use and consider a Puroma or Master Lock multi-pack if you need to cover more than one property.
Which key lock boxes are best for how work?
These lock boxes work by using a rotating combination dial or 4-digit code to release an internal latch, which frees a hinged door or shackle so a stored key can be removed.
Which key lock boxes are best for how to choose?
To choose between models, weigh how many keys you need to store, whether the box will be outdoors, and whether you need one unit or a multi-pack for several doors.
How do I choose key lock boxes?
Choose a key lock box by matching its mounting style and capacity to your entry point, checking whether it is rated for outdoor conditions, and deciding if a single unit or a multi-pack better fits how many locations you need to secure.
Our verdict
Master Lock's 5400EC line remains the dependable pick for straightforward, single or multi-door key storage, while Puroma's outdoor models are worth considering for properties that need extra weather durability. Buyers managing several locations should lean toward the multi-packs from either brand rather than purchasing single units repeatedly.