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🔐 Unlock peace of mind with smart, weatherproof key security!
The Master Lock 5400EC is a weather-resistant, portable key lock box featuring a resettable 4-digit combination lock. Crafted from durable metal, it securely stores up to five standard house keys and installs easily on most door knobs without scratching surfaces. Perfect for homeowners, realtors, and rental hosts, it offers flexible, keyless access control with a trusted lifetime warranty.























| ASIN | B0002YP1VC |
| Additional Features | Weather Resistant |
| Best Sellers Rank | #250 in Office Products ( See Top 100 in Office Products ) #1 in Security Lock Boxes |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Color | Black |
| Connectivity Protocol | Wi-Fi |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.7 out of 5 stars 25,364 Reviews |
| Finish Types | Powder Coated |
| Global Trade Identification Number | 00071649214516 |
| Included Components | Lock Box |
| Item Dimensions | 1.5 x 3.25 x 6.25 inches |
| Item Type Name | Lock Box |
| Item Weight | 16 ounces |
| Item dimensions L x W x H | 1.5 x 3.25 x 6.25 inches |
| Lock Type | Mechanical Code Lock |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 5400EC |
| Manufacturer Warranty Description | Limited Lifetime Warranty |
| Material | Metal |
| Material Type | Metal |
| Model Name | 5400D |
| Model Number | 5400D |
| Number of Pieces | 5 |
| Recommended Uses For Product | Household |
| Shape | Rectangular Cylinder |
| Special Feature | Weather Resistant |
| Style Name | Standard Shackle |
| UPC | 071649214516 |
| Unit Count | 1 Count |
T**.
Reliable, Secure, and Easy to Set Up
This Master Lock key lock box is well built and gives me confidence that my keys are secure. The combination is easy to set and change, and the lock operates smoothly every time. It has plenty of room for house keys and is perfect for real estate showings, contractors, family access, or emergency backups. The weather-resistant construction has held up well outdoors, and the sturdy design feels like it will last for years. If you’re looking for a dependable outdoor key lock box from a trusted brand, this one is an excellent choice. Highly recommended.
K**N
Solidly made with clear instructions
I was worried that it would not fit my doorknob-older house. It did, but surprise! I couldn’t close my door with the key safe on it. That never crossed my mind, or if I would I be able to close my screen door with the key safe in place. I never did find that out because the second problem was that I couldn’t close the key safe with a key in it. I took it on and off, multiple times, got it working with a key in it and have put it on a different door. I don’t want to fiddle with it now. It’s working and fine where it is. I am not moving it. It’s easy to set or change the combination, and except for getting it to close with a key inside, it has been easy to install/operate. I feel safer with my spare key in this quality Master Key safe. It’s very sturdy and my key is going to be accessible only to me. It’s not going to be easy for a thief to open it. I think my problems closing it were due to me, and not due to any problems with the key safe.
L**R
I wasn't sold on the electronic locks installed on the door itself
I've used these for both my house and a rental condo. It's easy to set and change codes when needed. Good for trusted contractors when you're not at home. It's also saved me a trip when condo tenants lock themselves out, and roommates lose or forget their keys. I was on a cruise last year and needed a neighbor to enter my condo to resolve an issue. I just texted him the code. I wasn't sold on the electronic locks installed on the door itself. If it's an older construction where the door sticks, etc., I was confident that the bolt would always retract properly. This seemed like a very inexpensive and reliable option for me.
T**.
The code can be reset.
I have 12 people who need access to a building. I give them the code and each can retrieve the door keys. This way i dont have keys scattered out everywhere. I can change the code as often as needed. Very sturdy and dependable.
S**Z
Reliable, Secure, and Perfect for Realtors
This Master Lock key lock box works exactly as expected and is perfect for realtors and property managers. The build quality is solid and durable, and it holds keys securely without feeling flimsy. Setting the combination code was quick and easy, and the lock opens smoothly every time. It’s great for outdoor use and gives peace of mind knowing keys are safely stored while still being easily accessible for showings or maintenance. Very convenient, dependable, and professional-looking. A must-have tool for anyone in real estate highly recommend.
N**E
Convenient
Works great can change the code anytime I have a back gate I use it for the Gardner’s and pest control that way I don’t have to be home when they come
D**S
Perfect
Excellent product
M**S
Better safe that sorry.
This arrived and was exactly what I needed and I recommend for a lot of folks. Hiding a key somewhere is not a great idea any longer. A way for someone to be able to get into your home in case of emergency or what have you. I live alone with my dog. I have 5 adult children that live less than 40 minutes from me. A lot of my neighbors are snowbirds or travel a lot. So not around often. My kids don’t carry keys to my house either. One day I was talking to one of my daughters on the phone as I was getting ready to go to a special work training on the other side of town. It was as early and only about 100 degrees outside. I was all ready to go, everything in my hands my water bottle, a snack, my bag, so as I held the phone between my ear and shoulder I took one hand and twisted the lock “tossed Hazel her treat yelling good bye” and shut the door. As the door shut. Oh NO!!!! Yep just locked mys of out of my house and my car. My daughter ended up calling a friend that’s a locksmith. He said he could probably break in and just charge her $20 for the call. My house is Fort Knox, I have one of the two unpickable locks, ant get in the windows because I have them all so they will only go up 2 inches. The only way is to break a window. He drilled through the lock and put the kind back in and was stunned that I had one like it. At that point my daughter said “Mom lock box today” for your sake and ours what if we couldn’t get a hold of you and then we couldn’t get in to the house. People need to think about these things, it has now come in handy for me to when one of my kids wants to borrow something from me and I’m not home. They just ask and I say sure and they go get it. So it works for a lot of things, but it’s really a pretty good idea but a lockbox not a hide a key key and the lockbox is pretty simple to use. You can input your own code in there so whatever you want it to be and you can also change it whenever you want to so give it to whomever you want and if you don’t want them to have it anymore, you change it just so simple. There’s also plenty of room inside of it to have a few keys if need be. I believe it’s also fireproof not that you need them to unlock your house but if you have a fireproof safe, I guess that would be a good place to have the key.
O**L
Scratches on shutter door
Like: purchasing to delivery is satisfactory and excellent Dislike: received a product with defects; obvious scratches on shutter door. I returned the product straight away after receiving it.
お**よ
とても便利です。
自宅用と車庫用と2つ購入しました。シンプルで使いやすく、モノとしてもしっかりしてます。
B**S
Quality
Easy to use.
M**N
Good
Good
C**S
Good so far
Working fine so far - waiting to see if it becomes weather affected.
Trustpilot
1 month ago
4 days ago