Master Lock Key Lock Box for House Keys – Outdoor Portable Combination Lockbox with Resettable 4 Digit Code, Weather Resistant…
Best for
Best overall
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 1 trusted source
Current price
$31.99
Updated May 18, 2026 · 1 min read
Sources behind this verdict
11 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Master Lock 5400D is the default recommendation for storing a spare house key behind a combination. A nytimes.com lockbox guide frames this category around portable combination boxes of this type, and amazon.com and homedepot.com verified-purchase reviewers describe it as easy to set up, sturdy enough for everyday weather, and convenient for pet sitters, contractors, and family members. With over 25,000 Amazon ratings averaging 4.7 stars, it's by far the most-validated product in this pool.
What reviewers liked
- Largest verified-review base in the category (25,000+ Amazon ratings, 4.7 average)
- Affordable at around $32 with resettable 4-digit combo and weather-resistant body
- Recommended across nytimes.com lockbox coverage and multiple retailer review pools
- Portable shackle design fits most door knobs without installation
Where it falls short
- r/lockpicking and r/LockPickingLawyer threads note dial combo boxes can be decoded by skilled attackers
- Holds only ~5 keys; not suitable as a key cabinet
- No app, audit log, or time-bound codes — every guest gets the same combo until you reset it
- Portable shackle is easier to remove than a wall-mounted unit
Across the reviewers we read, the Master Lock 5400D is the default recommendation for storing a spare house key behind a combination. A nytimes.com lockbox guide frames this category around portable combination boxes of this type, and amazon.com and homedepot.com verified-purchase reviewers describe it as easy to set up, sturdy enough for everyday weather, and convenient for pet sitters, contractors, and family members. With over 25,000 Amazon ratings averaging 4.7 stars, it's by far the most-validated product in this pool.
Specialist communities push back on the security ceiling. Threads in r/lockpicking and r/LockPickingLawyer note these dial-style boxes can be decoded by someone who knows what they're doing, and an Australian locksmith in r/LockPickingLawyer flatly says 'they're good enough for the purpose' provided the threat model isn't a skilled attacker. r/homesecurity echoes that 'most people won't have the finesse to pick locks,' so a cheap lockbox handles 99% of real cases.
The synthesis: for sharing a spare key with people you trust at a price under $35, this is the consensus pick. For securing anything valuable, the same reviewers steer you toward a wall-mounted or smart model instead.
- Secure Spare Key Access Without Copies
- Safely store up to five standard house keys in one place, eliminating the need to hide keys or distribute duplicates while maintaining controlled access for trusted users
- Resettable 4 Digit Combination Control
- Set and reset your own four digit combination at any time, giving you thousands of personalized code options for flexible access management without keys
- Built For Outdoor Reliability
- Durable metal body with a protective shutter door shields combination dials from weather exposure, while the vinyl coated shackle helps prevent surface scratches
- Fits Most Door Knobs And Handles
- Portable shackle design fits over most ball, biscuit, and tulip style door knobs, allowing quick installation without tools or permanent mounting
- Ideal For Home, Rentals, And Emergency Use
- Designed for residential homes, vacation rentals, real estate access, and emergency entry situations where dependable, shared key access is essential
- Why Master Lock
- Large capacity key lock box enables secure storage of up to five standard (2 inch) house keys; Shackle fits most ball, biscuit, and tulip door knob styles
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Most people won't have the finesse to pick locks or the patience, so your cheap lockbox should be fine 99% of the time.
Am Australian locksmith. The standard box is Kiddie. They're good enough for the purpose. If someone's turning up with tools to take the box ...
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“Master Lock Key Safe Honest Review and Tips (5401EURD model)” · YouTube
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