Master Lock Portable Small Lock Box, Set Your Own Combination Lock Portable Safe, Personal Travel Safe, 5900D, Gunmetal Grey
Best for
Best budget
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$17.97
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across verified-purchase reviewers, the Master Lock 5900D is the value pick in this pool, pairing the lowest price with a large review base of roughly 18,000 ratings at a 4.3 average. Buyers describe it as a compact, portable set-your-own-combination box suited to travel and personal-item storage as much as house-key duty. The 4.3 average is a notch below the 4.7 carried by the 5400D and 5401EC, and because the supplied data contains no expert lab tests or specialist-forum discussion, that gap in retailer sentiment is the main differentiator we can point to.
What reviewers liked
- Lowest price in the category with deep review volume (~18,000 ratings)
- Compact, portable set-your-own-combination design
- Versatile for travel and personal-item storage, not just keys
- Long-established, widely owned model
Where it falls short
- 4.3 average trails the higher-rated Master Lock boxes
- No independent expert or community testing in the supplied data
- Small size and portability limit security
- Mechanical-only with no smart features
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Across verified-purchase reviewers, the Master Lock 5900D is the value pick in this pool, pairing the lowest price with a large review base of roughly 18,000 ratings at a 4.3 average. Buyers describe it as a compact, portable set-your-own-combination box suited to travel and personal-item storage as much as house-key duty.
The 4.3 average is a notch below the 4.7 carried by the 5400D and 5401EC, and because the supplied data contains no expert lab tests or specialist-forum discussion, that gap in retailer sentiment is the main differentiator we can point to. It suggests slightly more mixed real-world experiences, which is worth weighing against the lower cost. As with all mechanical boxes here, it's a deterrent rather than a high-security solution.
For shoppers prioritizing price and a proven, widely owned design, the consensus supports it, with the caveat that the higher-rated siblings are only a few dollars more.
- Small safe is ideal for use as a travel safe or personal safe for protection and security from theft
- Secure small safe to a fixed object with cable; Portable safe is best used to protect smart phones, passports, cash, and credit cards
- Set your own four-digit combination portable safe; Ear bud/charging cable access port to conveniently listen to music or charge devices while locked
- Constructed with a shock absorbing foam, small lock box is designed to be water-resistant
- Exterior dimensions
- 2-1/4 inch H x 9-17/32 inch W x 4-59/64 D; Interior dimensions: 1-1/4 inch H x 8-1/8 inch W x 3-1/2 inch D
If the consensus convinced you
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