I like the how-to video for setting the combination. How do I open the U-lock hasp to secure it to the door, hose bib, etc?

Simply rotate the combination given when you PURCHASED the lock......pull....and it opens. Also, your own combination number is easy to set with knob inside of unit.

My house key is 2.5 inches long X 1 inch wide and shaped like a car key. Would my house key fit in this product?

The box is 3" x 2 1/2" x 1 1/2" deep, plus some additional space at the top. You should be able to fit the key in.

Can the code be changed?

Yes, easily. When you open the keybox you slide a lever over and then change the combination to anything you want, then slide the lever back and you are done. So you can use the keybox at different properties and never have the same code.

How does this work? Want to use it when I leave an elderly relative home in case fall alert is triggered.

It is a sturdy combination lock which you attach to the outer door handle. Give the customizable combination to your fall alert company, local emergency personnel, and other trusted persons. It works great

Master Lock Set Your Own Combination Portable Key Safe 3

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔐 Secure your keys, unlock your peace of mind.

UNIVERSAL FIT - Shackle designed to fit most ball, biscuit, and tulip door knobs for seamless installation.
COMPACT PORTABILITY - Sleek 3-1/4 inch wide design balances ample capacity with easy portability for indoor/outdoor use.
SPACIOUS VERSATILE - Accommodates up to five standard 2-inch house keys with an L-shaped interior for organized storage.
PERSONALIZED SECURITY - Set and reset thousands of unique 4-digit codes for ultimate control.
DURABLE WEATHERPROOF - Robust metal body with vinyl-coated shackle and protective shutter door guards against scratches and the elements.

The Master Lock 5400D Portable Key Safe offers a durable, weather-resistant metal lock box with a customizable 4-digit combination lock. Its compact yet spacious design securely stores up to five standard house keys, fitting most door knob styles. Ideal for both indoor and outdoor use, it combines robust protection with versatile portability, making it a must-have for professionals who value security and convenience.

Specifications

ASIN	B0002YP1VC
Additional Features	Durability
Best Sellers Rank	#76,780 in Home Improvement ( See Top 100 in Home Improvement ) #108 in Combination Padlocks
Brand	Master Lock
Brand Name	Master Lock
Colour	Black
Control Method	App
Controller Type	Combination control
Country of Publication	China
Customer Reviews	4.7 out of 5 stars 24,001 Reviews
Global Trade Identification Number	00071649214516
Included Components	none
Item Dimensions	9.2 x 5.2 x 1.9 Centimeters
Item Type Name	Set Your Own Combination Portable Lock Box
Item Weight	1 Pounds
Item dimensions L x W x H	9.2 x 5.2 x 1.9 Centimeters
Lock Type	Key
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
Product Finish Type	Painted
Shape	Rectangular
Special Feature	Durability
Style	Portable
Style Name	Portable
UPC	071649214516
Unit Count	1 Count

Reviews

N**A

22.12.2025

R**A

24.03.2025

V**.

19.11.2017

A**S

25.06.2019

N**A

21.03.2024

O**L

27.10.2023

お**よ

26.07.2015

M**N

1.12.2022

C**S

30.10.2019

P**S

27.08.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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