Rank #1 in Best Key Safe 2026: 10 Ranked, and the Numbers That Don't Add Up
Master Lock XL Key Safe, 106 x 146 x 53 mm, Black & Silver
Price and rating as shown on Amazon when we collected them. Both change.
The Master Lock 5403EURD takes the top spot in this guide at £27.00, with 4.6 out of 5 from 2,689 ratings and a best sellers rank of 14th in Key Cabinets. It is the extra large version of Master Lock's wall-mounted combination box: the listing puts the case at 146 x 106 x 53 mm and the inside at 117 x 79 x 42 mm.
That is the finding for this one. Most of the capacity claims in this guide come apart when you read the spec panel on the same page; this listing holds together. The headline 'XL 106 x 146 x 53 mm' matches the spec table's 14.6 x 10.6 x 5.3 cm once you reorder width and height, and at 5.3 cm deep the case sits inside the 4 to 6.3 cm band the other wall boxes in the list occupy. The number that does the limiting is the interior depth of 4.2 cm. That single figure explains why two of the reviews below describe buyers moving up from a smaller box rather than down. Everything on this page comes from the Amazon listing for this product, not from any test of our own.
How those 2,689 ratings break down
An average hides its own shape. This is the spread behind the 4.6 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £27.00 |
|---|---|
| Customer rating | 4.6 out of 5 from 2,689 ratings |
| Exterior dimensions (H x W x D) | 14.6 x 10.6 x 5.3 cm |
| Interior dimensions (H x W x D) | 11.7 x 7.9 x 4.2 cm |
| Lock type | 4 digit resettable combination |
| Material and colour | Aluminium, black and silver |
| Control method (as listed) | Touch |
| Model number | 5403EURD |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Package arrived safely and on time. Easily fitted We already had a Master Lock key safe but needed a bigger one as the number of keys had increased and only fitted in the old safe with great difficulty - this one seems great”
Verified purchase“Bought this after buying the next size down and it didn't fit a set of car keys. This one does and works well”
What it is up against
The rivals it was ranked against in Best Key Safe 2026: 10 Ranked, and the Numbers That Don't Add Up.
Questions people ask
How many keys will it hold?
The listing says only that the 'large internal cavity allows secure storage for multiple keys'. It gives no key count, and the stated interior is 11.7 x 7.9 x 4.2 cm.
How many combination codes are there?
Master Lock describes a resettable 4 digit combination and claims 'thousands of personalized combination code options'.
Can the Master Lock 5403EURD be mounted outdoors?
The copy says it is for indoor and outdoor use, with a shutter door to protect the combination dials from weather, and the Special Features field lists it as weather resistant.
Is it a touch operated lock?
The Control Method field says 'Touch', while the Lock Type field and the description both describe a resettable 4 digit combination dial. The listing does not reconcile the two.
What are the exact dimensions?
The listing gives exterior 14.6 x 10.6 x 5.3 cm and interior 11.7 x 7.9 x 4.2 cm, both stated as height x width x depth.
Is there a warranty?
Yes. The listing states a limited lifetime warranty against mechanical failure, and the mounting kit is included.
Comments
Reader comments are not checked against the manufacturer's claims above.
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