Puroma Key Lock Box, Portable Combination Lockbox Wall-Mounted Key Storage Box for House Keys, Resettable Code Safe Security Lock Box for Home, Office, Apartment Spare Key Storage

I wanted a no-fuss way to share a spare key without hiding it under a mat, and the Puroma lock box ended up being a practical, inexpensive solution. After a few weeks of daily use—mounted outside and occasionally swapped to the shackle for temporary access—I have a good sense of where it excels and where to be cautious.

Design and build

This is a straightforward, metal-bodied lock box with a matte gray finish that blends in rather than shouting “there’s a key here.” The body feels solid in the hand—heftier than bargain-bin options—thanks to an aluminum alloy shell and steel components. The faceplate slides off smoothly once you’ve entered the code; there’s no extra lever or finicky latch to fight, which I appreciated more than I expected.

The dials are clear and easy to read, with crisp detents that make it obvious when a number is aligned. They’re not loose or wobbly, which reduces accidental misalignment. The overall fit and finish are better than the price might suggest, and nothing on mine rattles or feels flimsy.

Inside, the cavity is sized for keys first and foremost. Think two to three standard house keys on a small ring or clip. You can stash a slim key tag or RFID card alongside, but bulkier modern car fobs will be a squeeze and may not sit flat. If you need to store multiple fobs or access cards, plan on a larger box.

Two ways to install

Puroma includes two mounting approaches:

• Wall-mount: The backplate has multiple mounting holes, and the box ships with four screws and expansion plugs. Into wood, installation is as simple as marking the holes, drilling pilot holes, and driving the screws. Into masonry, the plugs work fine as long as you drill the correct size hole and clear the dust. I recommend using all four screws for stability and better pry resistance.

• Shackle: There’s a removable U-shaped shackle so you can hang the lock box from a doorknob, handrail, or fence. The shackle lives inside the box for shipping—open it first to get to it. The shackle is sturdy enough for most residential hardware, though like any portable setup, overall security depends on the strength of what you’re attaching it to. If you’re hanging it on a flimsy knob or thin railing, a wall mount will always be more secure.

Swapping between the two modes is easy, which is handy if you alternate between a fixed installation at home and temporary use for guests, contractors, or a garage.

Setup and code management

Out of the box, the code is preset to 0000. Changing it is a four-step process that takes under a minute, and you can reprogram it as often as you like. The important habits:

• Change the code with the door open so you don’t lock yourself out if you mis-set it.
• Scramble the dials after closing; don’t leave your code showing.
• Rotate codes periodically if you share access with multiple people.

The dials are smooth enough that even kids or gloved hands can operate them, but not so loose that they drift off-number if you brush them.

Day-to-day use

In practice, the Puroma lock box is refreshingly simple. Enter the code, pull the faceplate, grab a key. No sticking, no jiggling. The opening is large enough to reach in without fuss, and the interior edges are clean—no sharp burrs to catch on keyrings.

Capacity is adequate for a small household: I typically keep two standard house keys and a small mailbox key inside, sometimes with a thin RFID tag. Anything bulkier is hit or miss. You can make more room by removing oversized keychains or covers.

I’ve found it particularly convenient for kid access after school, pet sitters, and one-off visits from tradespeople. It’s also a straightforward option for short-term rentals if you want to avoid app-based smart locks or battery maintenance.

Security considerations

No mechanical key box is invulnerable, and this one is no exception. As a deterrent to casual tampering and opportunistic theft, it performs as you’d hope. The metal body resists casual prying and light hammering; the shackle is robust compared to plastic-bodied competitors. The four-digit combination gives you 10,000 possibilities, which is standard for this class.

That said, motivated attackers with time and tools can defeat most surface-mounted lock boxes. The best way to get the most out of this unit:

• Mount to a solid surface with all included screws, ideally into wood studs or masonry.
• Consider using your own tamper-resistant screws if it’s in a high-traffic or visible area.
• Place it in a discreet, sheltered location rather than eye level near the front door.
• If using the shackle, choose a sturdy fixture (not a thin aluminum handle) and be aware that any portable configuration is inherently less secure than a hard mount.

For higher-risk environments or access tied to valuables, a commercial-grade box or an integrated smart deadbolt may be more appropriate. For spare keys and routine household access, this strikes a sensible balance of convenience and protection.

Weather resistance

The unit is weather-resistant, not waterproof. In my testing outdoors, rain and sun didn’t cause any immediate issues—the dials continued to turn smoothly, and the door didn’t bind. However, because the dials are exposed and there’s no rubberized front cover, I wouldn’t mount it in a spot that gets blasted by sprinklers or direct storm runoff.

Practical tips:

• Choose a sheltered overhang or side wall instead of an open fence post.
• Every few months, add a tiny drop of silicone lubricant to the dial shafts if you’re in a dusty or salty environment.
• Avoid packing paper notes inside; they’ll wick moisture. If you must, use a small zip bag.

What I like

• Solid, weighty build without moving parts that feel fragile
• Smooth, easy-to-read dials and a simple pull-to-open faceplate
• Flexible installation with both wall mount and removable shackle
• Straightforward code reset process
• Sensible, compact footprint that doesn’t broadcast its presence

What could be better

• The interior volume is for keys only; bulky fobs are a tight fit
• No weather flap over the dials, so long-term exposure isn’t ideal
• Like all 4-digit boxes, it’s a deterrent—not a high-security device

Who it’s for

• Homeowners and renters who want a dependable spare key solution
• Hosts, cleaners, and pet sitters who need temporary, code-based access
• Small offices or shared spaces where a couple of keys need to be available after hours
• Anyone who prefers a mechanical solution over smart locks and app ecosystems

If you need to store more than a few keys, or you’ll be mounting in an exposed, harsh environment, consider a larger unit with a weather cover. If your risk profile is higher (valuable equipment or isolated locations), step up to a heavier-duty, commercial-grade box.

Bottom line and recommendation

The Puroma lock box hits the practical sweet spot: sturdy enough to deter casual tampering, simple enough to use without instructions after day one, and flexible enough to mount permanently or hang temporarily. It isn’t a vault, and it isn’t designed to live in a torrent of rain, but for everyday key sharing and backup access, it’s a trustworthy workhorse.

I recommend it for households, light commercial use, and anyone who wants a reliable mechanical key safe without spending a lot or dealing with batteries and apps. Mount it securely, place it out of direct exposure, and manage your code sensibly, and it will do exactly what you need—keep spare keys available without compromising your door.