# Best Key Safe 2026: 10 Ranked, and the Numbers That Don't Add Up Source: https://www.ranked10.co.uk/home/best-key-safes Published: 2026-09-19 | Updated: 2026-09-19 | Prices checked on Amazon UK on 2026-09-19 Two numbers sell a key safe: code combinations and internal capacity. In this list both are repeatedly contradicted by the rest of the same listing. The most expensive box here, at £68.95, calls itself 'rust and water resistant' and 'designed to be wall mounted outdoors', while the spec panel on the same page gives its water resistance level as 'Not Water Resistant'. Capacity is just as loose. The Yale box claims 1 litre (1,000 cm³) and lists both its depth and its height as 18.7 cm, where every other wall box in this list is 4 to 6.3 cm deep. Meanwhile the Mohard 8107 claims 50 cl (500 cm³) inside an enclosure its own spec table measures at 6 x 9.5 x 6 cm — 342 cm³ of exterior volume. We ranked ten of the best key safe options on Amazon on three things you can check yourself: the dimensions and materials printed on the listing, the size of the review base behind each star rating, and whether the spec table agrees with the sales copy. Where it doesn't, we say so. Compare the interior measurements with a tape measure and the review counts with a spreadsheet, not the headline figures. ## The ranking ### 1. Master Lock XL Key Safe, 106 x 146 x 53 mm, Black & Silver - Price: £27.00 | Amazon rating: 4.6 from 2,689 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/master-lock-xl-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B001GULPHU?tag=ranked10-21 Top of the list for raw space — interior 11.7 x 7.9 x 4.2 cm, roughly 388 cm³, and 2,689 ratings at 4.6 stars. This key safe takes the top spot on volume rather than on price. The interior measures 11.7 x 7.9 x 4.2 cm — roughly 388 cm³ — against about 159 cm³ for the light-up model in second place, which costs £4 more at £31.00. That is the difference between carrying a couple of house keys and storing a full set with a fob. The body is aluminium with a shutter door that closes over the four dials, so the combination is covered when the box is locked. The code is resettable, the mounting kit is in the box, and there is nothing to power. Master Lock backs it with a limited lifetime warranty against mechanical failure. That said, 'Weather Resistant' is a description, not a grade — the listing gives no IP number, and aluminium is softer than the hardened alloy on the £68.95 box further down this list. If your wall takes driving rain all winter, or your insurer wants a documented rating, this isn't the one. Pros: Interior of 11.7 x 7.9 x 4.2 cm — roughly 388 cm³, the largest cavity in this list; 2,689 ratings at 4.6 stars, with 77 of the 100 ratings shown at five stars; £27.00, which is £4 less than the light-up model with a smaller interior; Aluminium body, shutter door over the dials, mounting kit included; Resettable 4-digit combination with no battery and no wiring Cons: 'Weather Resistant' with no IP rating given anywhere on the listing; 53 mm deep, so it stands off a narrow door frame; No emergency key or code-recovery route if the combination is forgotten; Ranked 6,098 in DIY & Tools, behind several cheaper boxes ### 2. Master Lock Light Up Dial Key Safe, Medium, Grey - Price: £31.00 | Amazon rating: 4.7 from 5,723 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/master-lock-5425eurd-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B01M3PKXRX?tag=ranked10-21 The most-reviewed box here — 4.7 stars from 5,723 ratings — with a 159 cm³ interior, less than half the XL's. Second place goes to the biggest review base here: 5,723 ratings at 4.7 stars, the highest rating in the ten. The trade-off is space. Interior dimensions are 106 x 60 x 25 mm, about 159 cm³, against 388 cm³ for the XL above it, which is also £4 cheaper. The point of this model is the dial. It lights up automatically each time the weather cover opens, running on a replaceable CR2032 that comes installed. Worth noting if the box goes on a north-facing wall or beside a door with no light. Here the numbers get looser. The listing's own Special Features field says 'Waterproof' while the water resistance field says only 'Water Resistant', and the chamber depth is given as 2.05 cm in the spec table against 25 mm in the copy. Either way, 25 mm of usable depth is thin: flat keys yes, bulky fobs no. If you need a wall mounted key safe for a car key, look at the XL instead. Pros: 4.7 stars from 5,723 ratings — the largest and highest-rated review base in this list; Dials light up automatically when the cover opens, on a replaceable CR2032; £31.00 with the mounting kit included; Metal body and a weather cover over the dials; Resettable 4-digit combination, set and reset by the owner Cons: Interior of 106 x 60 x 25 mm, about 159 cm³ — under half the XL's cavity; Spec table lists chamber depth at 2.05 cm while the copy says 25 mm; 'Waterproof' in Special Features against 'Water Resistant' in the spec table; A battery is one more thing to fail; the mechanical boxes here have none ### 3. KeySafe C500 Pro Police Preferred Key Safe, £68.95 - Price: £68.95 | Amazon rating: 4.6 from 1,502 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/keysafe-c500-pro - Buy on Amazon: https://www.amazon.co.uk/dp/B09JKFYWQ6?tag=ranked10-21 The most expensive box here, at £68.95, and the only one claiming 'Secured by Design' — while its own spec table says 'Not Water Resistant'. At £68.95 this is the most expensive product in the list, close to three times the £23.41 Yale at the other end. What you pay for is the claim in the title: 'Secured by Design' police preferred specification, a single-piece hardened zinc alloy body, and a stated capacity of six keys. It is fully mechanical. No power, no internet, no battery; over 4,000 combinations by the maker's count, tested from -32°C to 68°C, with an ABS weather cover, a mounting kit and a code-changing tool in the box. The internal hook keeps keys from dropping out of reach when you open it. The catch is on the same page. The bullet copy says 'rust and water resistant' and 'designed to be wall mounted outdoors'; the spec table gives the water resistance level as 'Not Water Resistant'. Those two statements cannot both be right. At 6.3 cm deep and 1.8 kg it is also the heaviest box here, so it needs a solid fixing — not hollow plasterboard. Pros: The only product in this list claiming 'Secured by Design' police preferred specification; Single-piece hardened zinc alloy construction, 1.8 kg; Stated capacity of 6 keys with an internal hook; Fully mechanical: over 4,000 combinations, no battery or wiring; Rated for -32°C to 68°C, with ABS weather cover, mounting kit and code-changing tool Cons: £68.95 — close to three times the cheapest box in this list; Its own spec table says 'Not Water Resistant' while the copy says rust and water resistant; 6.3 cm deep, so it stands well off the wall; 1.8 kg needs a solid substrate; hollow plasterboard won't hold it ### 4. Master Lock Portable Key Safe with Shackle, Medium - Price: £29.40 | Amazon rating: 4.3 from 1,626 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/master-lock-portable-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B000JTIX10?tag=ranked10-21 The only non-wall box in the ten: it hangs on a shackle, with a 151 cm³ cavity, 1,626 ratings at 4.3 stars and the No. 1 spot in Key Cabinets. This is the only combination key safe in the list that isn't fixed to a wall. It hangs from a shackle over a door knob, and the interior measures 7.4 x 6.8 x 3.0 cm — about 151 cm³, the smallest cavity of the ten, against 388 cm³ for the XL at the top. In practice that makes it the option for a rented flat, a carer's round or a holiday let where you can't drill. The four-digit combination is resettable, a shutter door covers the dials, and the metal body follows the same construction as the Master Lock XL. Even so, a shackle is only as strong as whatever it hangs on, and this is the lowest rating in the top five: 4.3 stars from 1,626 ratings, with 8 of the 100 ratings shown at one star. If the door handle is the weak point, the box adds little. Pros: Portable shackle fits over a door knob, so no drilling is needed; Interior of 7.4 x 6.8 x 3.0 cm, roughly 151 cm³; Resettable 4-digit combination with a shutter door over the dials; Number 1 best seller in Key Cabinets; £29.40 with the same metal body construction as the XL wall box Cons: 4.3 stars from 1,626 ratings — the lowest rating in the top five, with 8 of 100 shown ratings at one star; Smallest cavity in this list at about 151 cm³; Security is limited by whatever it is hung on; No wall fixings, because it isn't designed to be mounted ### 5. Rhino Lock Secure Pro Combination Key Safe, 300 cm³ - Price: £26.95 | Amazon rating: 4.5 from 1,387 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/rhino-secure-pro-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B07YMYZ53J?tag=ranked10-21 A claimed 300 cm³ of internal space, two code-recovery keys and 4.5 stars from 1,387 buyers — but a 10 cm depth figure worth checking. Over 1,300 buyers have rated it, and it holds at 4.5 stars. The claimed internal storage is approximately 300 cm³, more space on paper than either of the Master Lock boxes above it. The price sits in the middle of the range at £26.95. The practical extra is recovery. Two code-recovery keys come in the box, so a forgotten combination doesn't mean a new safe; there is also an emergency key route and a removable internal drawer for cards or cash. The wall mounting kit, a key hook and instructions are included. However, the spec table lists the depth as 10 cm, where every other wall-mounted box in this list runs from 4 to 6.3 cm deep. Either it stands unusually far off the wall or that figure is wrong. If you want a low-profile outdoor key safe beside a front door, this is not it. Pros: Claimed 300 cm³ of internal storage — more than the Master Lock boxes above it; Two code-recovery keys and an emergency key route included; 4.5 stars from 1,387 ratings; £26.95 with a full wall mounting kit, key hook and removable drawer; Weather-resistant aluminium alloy body at 637 g Cons: Spec table gives a 10 cm depth; every other wall box here is 4 to 6.3 cm; 'Waterproof' in Special Features against 'Water Resistant' in the spec table; No IP rating, so weather resistance is a claim rather than a grade; The 10 cm depth figure is explained nowhere on the listing ### 6. Mohard Key Safe Wall Mounted, 12 Digit Code Combination - Price: £25.99 | Amazon rating: 4.5 from 1,179 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/mohard-8109-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B0F6T9415X?tag=ranked10-21 The wide-button option: a 12-digit headline that its own copy then reduces to 4-8 digits, with 4.5 stars from 1,179 ratings. The headline is a 12-digit code, far more than the four-digit dials used by most of this list. The same bullet, though, ends with 'Pro Tip: 4-8 dig...' — so the maker recommends setting four to eight digits. The 12 is a ceiling, not the intended setting. Physically it is a wall box with large, high-contrast buttons, aimed at anyone who finds a small dial awkward. The claimed interior of 4.13 x 2.36 x 1.77 inches works out at about 283 cm³, said to hold roughly 10 standard keys, with internal hooks to stop them sliding out of reach. The catch is smaller but real: the spec sheet says no assembly is required, and the assembly instructions field on the same page says 'Yes'. In practice it is four screws and four expansion anchors, and a screwdriver is included. If you want someone else to fit it, budget for that. Pros: 12-digit maximum code, against 4 digits on the mechanical boxes here; Large, clearly readable buttons for anyone who finds small dials awkward; Claimed interior of 4.13 x 2.36 x 1.77 inches — about 283 cm³, stated to hold roughly 10 standard keys; 4.5 stars from 1,179 ratings at £25.99; Screwdriver, four screws and four expansion anchors included Cons: Its own bullet recommends a 4-8 digit code, so the 12-digit headline is a ceiling; Spec sheet says no assembly required, while the assembly instructions field says 'Yes'; Ranked 1 in 'Office Storage Lockers', a category that says little about outdoor use; ABS shield over the keypad only, with no IP rating stated ### 7. Yale Y500/187/1 Combination Key Safe Box, Wall Mounted - Price: £23.41 | Amazon rating: 4.5 from 1,103 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/yale-y500-187-1-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B003VHLW3I?tag=ranked10-21 The cheapest box here at £23.41 — and the one whose capacity claim contradicts its own listed dimensions. This is the lowest price in the list at £23.41, rated 4.5 stars from 1,103 buyers. The spec fields are where it gets interesting. Capacity is given as 1 litre — 1,000 cm³ — and the dimensions as 18.7 cm deep, 13 cm wide and 18.7 cm high. Do the arithmetic and the two figures stop agreeing. Depth and height are listed as the same number, 18.7 cm, when every other wall box here is 4 to 6.3 cm deep. A steel box 13 cm wide holding a full litre would be a deep, chunky unit, not the flat box in the photos. What is solid is the construction: thick steel, a 4-wheel resettable combination, a key hook and a two-year warranty. By contrast, there are no internal dimensions at all, so the 1 litre cannot be checked against anything. 'Portable' also appears under Special Features for a box designed to be screwed to a wall. Even so, if you want the cheapest steel combination box in the list, this is it. Pros: Cheapest box in this list at £23.41; Thick steel body — a harder material than the aluminium used by several rivals here; 4-wheel resettable combination with a key hook for the keys; 4.5 stars from 1,103 ratings; Two-year manufacturer warranty Cons: Claims 1 litre (1,000 cm³) while its dimensions are listed as 18.7 cm deep and 18.7 cm high; every other wall box here is 4 to 6.3 cm deep; 'Portable' listed as a special feature on a wall-mounted box; No internal dimensions given, so the 1 litre cannot be verified; Only 37th in Key Cabinets, behind boxes that cost more ### 8. Rhino Lock Secure Key Combination Safe, Medium, Black - Price: £25.95 | Amazon rating: 4.6 from 836 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/rhino-lock-secure-key - Buy on Amazon: https://www.amazon.co.uk/dp/B07B6NVMM1?tag=ranked10-21 The smaller Rhino: 167 cm³ claimed inside a 4 x 9.5 x 11.5 cm body, 4.6 stars from 836 ratings, and a depth field that is really the height. From the same maker as the Secure Pro, this one claims less: approximately 167 cm³ of internal storage against 300 cm³, inside a body listed at 4 x 9.5 x 11.5 cm. That exterior works out at about 437 cm³, so the claimed interior is roughly 38% of the box — a believable ratio, unlike a couple of others here. The mechanism is a four-digit combination with a small push button for quick access, both sitting behind a black weather cover. At 480 g it is under a third of the weight of the £68.95 model, so one brick fixing is realistic, and the mounting kit is included. One field does not line up: 'Chamber Depth' is given as 11.5 cm, which is the full height of the box rather than a chamber measurement. If you need to know whether a chunky car fob fits, don't read that figure as usable depth. This is a key lock box for a porch or a back door, not a high-security unit. Pros: Claimed 167 cm³ of internal storage inside a 4 x 9.5 x 11.5 cm body; 4.6 stars from 836 ratings, with 74 of the 100 ratings shown at five stars; 4-digit combination plus a push button, both behind a weather cover; 480 g with a full wall mounting kit, so one brick fixing is realistic; £25.95 — the cheaper of the two Rhino Lock boxes here Cons: Internal capacity is about half the Secure Pro's claimed 300 cm³; 'Chamber Depth' of 11.5 cm is the box height, not a chamber dimension; Water resistance is given as a level, with no IP number; No emergency key or code recovery, unlike its more expensive sibling ### 9. Squire Key Keep2 Push Button Key Safe Box, Wall Mounted - Price: £24.99 | Amazon rating: 4.2 from 725 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/squire-key-keep2-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B018WIE7ZA?tag=ranked10-21 The lowest-rated box in the list at 4.2 stars, with 10,000-plus combinations and two sets of dimensions that don't match. With 725 ratings at 4.2 stars, this sits at the bottom of the list on rating, and 7 of the 100 ratings shown are one star. What it does offer is codes: 12 push buttons and over 10,000 combinations, the highest claimed figure among the mechanical boxes here. The body is diecast alloy with a shutter over the buttons, and Squire backs it with a 10-year guarantee — the longest warranty in this list by some distance. The footprint is small, about 12 cm tall, which suits a porch or a cupboard door. Two fields are worth flagging. Water resistance is listed as 'Waterproof' in the spec table while the bullet copy only says weatherproof, and 'Alarm: acoustic' appears in the spec sheet even though nothing in the copy describes an alarm. In theory the 10,000 combinations are the selling point; in practice ask the maker for a rating before you trust it on an exposed wall. Pros: Over 10,000 combinations from 12 push buttons — the highest claim among the mechanical boxes here; Diecast alloy body with a shutter over the buttons; 10-year manufacturer guarantee, the longest in this list; £24.99, near the bottom of the price range; About 12 cm tall, so it fits a porch or cupboard easily Cons: 4.2 stars is the lowest rating in this list; 7 of the 100 ratings shown are one star; Copy says 8 x 6 x 12 cm while the spec table says 5.7 x 7.8 x 12.1 cm; Spec sheet lists an acoustic alarm that the copy never describes; 'Waterproof' in one field and weatherproof in another, with no IP number either way ### 10. Mohard Key Safe Wall Mounted, 4-Dial with Spare Keys - Price: £23.78 | Amazon rating: 4.6 from 487 ratings - Full review: https://www.ranked10.co.uk/home/best-key-safes/mohard-8107-key-safe - Buy on Amazon: https://www.amazon.co.uk/dp/B0FX2T37X8?tag=ranked10-21 Tenth place because the capacity figure is the loosest in the list: 50 cl claimed inside a body its own spec table measures at 342 cm³. The capacity claim here is 50 centilitres, or 500 cm³. The spec table on the same page measures the enclosure at 6 x 9.5 x 6 cm, which is 342 cm³ of exterior volume. A box cannot hold more on the inside than it measures on the outside, so one of those two numbers is wrong. That is why it sits tenth. The rest is straightforward. A four-dial combination with 10,000 claimed settings, three spare keys for code recovery, and a claimed interior of 4.13 x 2.36 x 1.77 inches — about 283 cm³, which fits inside 342 cm³ far better than 500 cm³ does. The aluminium alloy body sits under a weatherproof ABS cover, with four screws and four anchors supplied. One more field to ignore: the lock type is listed as 'Electronic Combination Lock', though this is a mechanical four-dial box with spare keys and no electronics. As a key safe for house keys on a budget it is fine at £23.78; as a 500 cm³ box it isn't. Pros: £23.78 — one of the two cheapest boxes in this list; 4.6 stars from 487 ratings; 4-dial combination with 10,000 claimed settings and three spare keys; Aluminium alloy body with a weatherproof ABS cover; 300 g, light enough for a single fixing Cons: Claims 50 cl (500 cm³) inside a body its own spec table measures at 6 x 9.5 x 6 cm — 342 cm³; Lock type given as 'Electronic Combination Lock' on a mechanical 4-dial box; The smallest review base here at 487 ratings, so the 4.6 is less settled; No IP rating stated ## Verdict For most homes, the Master Lock XL at £27.00 is the sensible buy: roughly 388 cm³ of internal space and 2,689 ratings at 4.6 stars. If you want the highest-rated key safe here, the light-up dial model at £31.00 has 4.7 stars from 5,723 buyers and runs on a replaceable CR2032. If a landlord or an insurer asks for a police preferred key safe, the £68.95 C500 Pro is the only one in this list making that claim — but read its 'Not Water Resistant' spec line first. Either way, measure the wall before you buy, and compare interior dimensions rather than the capacity headline.