# Master Lock XL Key Safe, 106 x 146 x 53 mm, Black & Silver

Source: https://www.ranked10.co.uk/home/best-key-safes/master-lock-xl-key-safe
Ranked #1 in "Best Key Safe 2026: 10 Ranked, and the Numbers That Don't Add Up": https://www.ranked10.co.uk/home/best-key-safes

- Price: £27.00 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.6 from 2,689 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B001GULPHU?tag=ranked10-21

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.

## Specification

| Field | Value |
|---|---|
| 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 |

## 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.