JMA 'Help Key' Magnetic Hide Key Box - Small Size
The JMA 'Help Key' Magnetic Hide Key Box (part code T1-P) is a compact, no-electronics solution for hiding a spare key in a magnetic blind spot. At 75 x 45 x 15 mm, this small-format version is designed for situations where space is tight or where a lower profile is needed — inside a narrow gate rail, behind a vehicle panel, or anywhere the larger T2-G would be too obvious or too bulky to conceal.
The magnetised base adheres to any steel or iron surface without drilling or adhesive. The box slides open to reveal the key cavity and snaps closed. There is no combination, no code, and no battery — the concealment location is the security layer. Supplied on a retail display card, it is ready for immediate use or point-of-sale display.
JMA is a well-established Spanish manufacturer of key-cutting equipment, blanks, and key accessories, distributed across Australia through locksmith and hardware trade channels.
Key Features
- Compact 75 x 45 x 15 mm body — lower profile and easier to conceal than the large version
- Magnetised base attaches to steel or iron surfaces with no drilling or adhesive
- Slide-open / snap-closed design — quick to access when needed
- Durable black plastic construction
- No batteries, no combination, no electronics — purely passive
- Ideal for tight spaces where the larger T2-G would protrude
- Supplied on a retail display card — ready to use or display in-store
Suitable Uses
Tight concealment locations — narrow gate rails, behind slim vehicle panels, inside machinery housings, or any location where the 100 mm length of the large version is too prominent
Under vehicles — attach to a steel section of the vehicle chassis or wheel arch for emergency key access when locked out
Standard slim door keys — fits most standard house keys that have not been modified with bulky heads or remote fobs; confirm fit with any key before relying on this for emergencies
Smart lock backup key storage — if your smart lock has a mechanical key override, storing the override key in a concealed magnetic box outside the property is standard practice. See our guide to key hiders for smart lock override keys
Not suitable for — large or bulky car keys with rubber heads, transponder key fobs, or modern smart keys. The 75 x 45 mm cavity is suited to a standard slim cut key only. For larger keys, consider the JMA T2-G large version (100 x 55 x 15 mm). Also not suitable for aluminium, plastic, or fibreglass surfaces — the magnet will not adhere.
Key Hider Range at Terry's
Terry's stocks several magnetic and concealment-style key hiders across different formats and security levels. Choose based on how discreet, how weatherproof, and how hard-to-find you need the hidden key to be.
| Product | Part Code | Format | Key Capacity | Notes |
|---|---|---|---|---|
| JMA 'Help Key' Magnetic Hide Key Box — Small (This Product) | T1-P | Magnetic slide box | 1 key | 75 x 45 x 15 mm — slim keys only |
| JMA 'Help Key' Magnetic Hide Key Box — Large | T2-G | Magnetic slide box | 1 key | 100 x 55 x 15 mm — fits most door keys |
| FK Surf Key Hider Magnetic (Large) — read review | — | Magnetic concealment case | 1 key | Surf/beach-oriented; strong dual-magnet |
| Lucky Line Sprinkler Key Hider | — | Camouflaged garden ornament | 1 key | Looks like a garden sprinkler; ground-mounted |
| Lucky Line Rock Key Hider 90601 | 90601 | Camouflaged rock | 1 key | Realistic stone appearance; garden-placement |
Available Finish Options
Black
(This Product)
STK T1-P
Finish does not affect function or performance.
Full Specifications
| Part Code | T1-P |
| SKU | STK T1-P |
| Brand | JMA |
| Dimensions | 75 x 45 x 15 mm |
| Mount Type | Magnetic base — attaches to steel/iron surfaces |
| Key Capacity | 1 standard slim key |
| Opening Mechanism | Slide-open / snap-closed |
| Colour / Finish | Black |
| Material | Plastic body with magnetic base |
| Power | None — fully mechanical/passive |
| Electronic Access | None |
| Combination / Code | None — concealment is the security mechanism |
| Packaging | Carded for retail display |
| Origin | JMA (Spain) |
Frequently Asked Questions
What is the difference between the small (T1-P) and large (T2-G)?
The T1-P is 75 x 45 x 15 mm; the T2-G large version is 100 x 55 x 15 mm. The small version is better for slim locations where the extra 25 mm of the large box would be noticeable — narrow gate rails, tight vehicle sections, or spaces with limited clearance. Both are the same black slide-close format at the same price. If you are unsure which to choose, the large version is more likely to fit a wider range of key types.
The T1-P is 75 x 45 x 15 mm; the T2-G large version is 100 x 55 x 15 mm. The small version is better for slim locations where the extra 25 mm of the large box would be noticeable — narrow gate rails, tight vehicle sections, or spaces with limited clearance. Both are the same black slide-close format at the same price. If you are unsure which to choose, the large version is more likely to fit a wider range of key types.
Will it hold a standard house key?
Yes — the T1-P is designed for a standard slim cut key. Modern house keys without bulky heads or electronic fobs will fit comfortably. If your key has an oversized head, coloured grip, or rubber surround, test the fit before relying on this for emergency access. The large T2-G (100 x 55 mm) allows more room for slightly larger keys.
Yes — the T1-P is designed for a standard slim cut key. Modern house keys without bulky heads or electronic fobs will fit comfortably. If your key has an oversized head, coloured grip, or rubber surround, test the fit before relying on this for emergency access. The large T2-G (100 x 55 mm) allows more room for slightly larger keys.
Can I mount it outside, exposed to weather?
The slide-close lid provides basic splash resistance but JMA does not publish an IP weatherproofing rating for this product. It is suitable for sheltered outdoor locations (under a vehicle, inside a gate rail, behind a protected surface) but should not be exposed to direct sustained rain or submersion. For outdoor key storage with a confirmed weatherproof rating, a wall-mounted combination key safe such as the Burg-Wachter KS-30 is a better choice.
The slide-close lid provides basic splash resistance but JMA does not publish an IP weatherproofing rating for this product. It is suitable for sheltered outdoor locations (under a vehicle, inside a gate rail, behind a protected surface) but should not be exposed to direct sustained rain or submersion. For outdoor key storage with a confirmed weatherproof rating, a wall-mounted combination key safe such as the Burg-Wachter KS-30 is a better choice.
Can I use this to store the override key for my smart lock?
Yes. If your smart lock has a mechanical key override, storing that key on the exterior of the property in a concealed location is recommended practice. A magnetic box hidden inside a gate rail, under a letterbox frame, or behind garden equipment is a common approach. The key is that the location is not visible from the street and would not be found by casual observation — the box itself provides no mechanical barrier, only concealment.
Yes. If your smart lock has a mechanical key override, storing that key on the exterior of the property in a concealed location is recommended practice. A magnetic box hidden inside a gate rail, under a letterbox frame, or behind garden equipment is a common approach. The key is that the location is not visible from the street and would not be found by casual observation — the box itself provides no mechanical barrier, only concealment.
Does the magnet work on aluminium or stainless steel?
No. Standard magnets do not adhere to aluminium, fibreglass, or non-magnetic stainless steel. Most vehicle bodies, gate frames, and machinery will have steel or iron sections that work well, but check before assuming. If your intended surface is aluminium or powder-coated aluminium, this product is not suitable. A garden-concealment style key hider such as the Lucky Line Rock Key Hider or Sprinkler Key Hider does not require a magnetic surface.
No. Standard magnets do not adhere to aluminium, fibreglass, or non-magnetic stainless steel. Most vehicle bodies, gate frames, and machinery will have steel or iron sections that work well, but check before assuming. If your intended surface is aluminium or powder-coated aluminium, this product is not suitable. A garden-concealment style key hider such as the Lucky Line Rock Key Hider or Sprinkler Key Hider does not require a magnetic surface.
Additional Information
Choose the small version when concealment matters more than key size
The T1-P is the right choice when your priority is fitting into a narrow space or making the box as hard to spot as possible. Its 75 x 45 mm footprint sits significantly lower than the T2-G. If your key fits in the smaller box, the shorter length is generally better for concealment. If you need to fit a larger or bulkier key, use the T2-G large version.
The T1-P is the right choice when your priority is fitting into a narrow space or making the box as hard to spot as possible. Its 75 x 45 mm footprint sits significantly lower than the T2-G. If your key fits in the smaller box, the shorter length is generally better for concealment. If you need to fit a larger or bulkier key, use the T2-G large version.
Location selection is the real security
A magnetic key box provides no mechanical barrier — anyone who finds it can open it. The security is the concealment location you choose. Best locations are invisible from street level, protected from casual discovery (inside a hollow rail or behind a vehicle body panel), and accessible to you quickly in an emergency. Avoid commonly known locations: directly under the front bumper centre, on the driver's door sill, or under the letterbox. Read our guide to key hiders and placement for more advice.
A magnetic key box provides no mechanical barrier — anyone who finds it can open it. The security is the concealment location you choose. Best locations are invisible from street level, protected from casual discovery (inside a hollow rail or behind a vehicle body panel), and accessible to you quickly in an emergency. Avoid commonly known locations: directly under the front bumper centre, on the driver's door sill, or under the letterbox. Read our guide to key hiders and placement for more advice.
Magnetic key boxes vs wall-mounted key safes
Magnetic key boxes are best where you want no visible hardware and no drilling. Wall-mounted combination key safes — such as the Burg-Wachter KS-30, Carbine CKS-SH-BUT-L, or the ABUS KG747LC — add a code barrier, meaning finding the box is not enough on its own to access the key. For Airbnb, short-stay rental, or any higher-security application, a combination key safe is more appropriate — see our Airbnb & Short-Stay Rentals chapter for key access strategies in that context. For best-practice mechanical key storage strategy, read the mechanical surf key strategy guide, and see how surf-style key boxes work for a format comparison.
Magnetic key boxes are best where you want no visible hardware and no drilling. Wall-mounted combination key safes — such as the Burg-Wachter KS-30, Carbine CKS-SH-BUT-L, or the ABUS KG747LC — add a code barrier, meaning finding the box is not enough on its own to access the key. For Airbnb, short-stay rental, or any higher-security application, a combination key safe is more appropriate — see our Airbnb & Short-Stay Rentals chapter for key access strategies in that context. For best-practice mechanical key storage strategy, read the mechanical surf key strategy guide, and see how surf-style key boxes work for a format comparison.
Smart lock backup key storage — the fuller picture
Most smart locks with a mechanical key override include two override keys. Best practice is to keep one inside the house and store the second outside, concealed on the property, so that a dead battery never leads to a lockout. This key box is one option for that second key. For a full explanation of backup key management on smart locks, see our guide to what happens when a smart lock battery dies.
Most smart locks with a mechanical key override include two override keys. Best practice is to keep one inside the house and store the second outside, concealed on the property, so that a dead battery never leads to a lockout. This key box is one option for that second key. For a full explanation of backup key management on smart locks, see our guide to what happens when a smart lock battery dies.
It can be overwhelming with all the choices out there. We can help! We are experts with decades of experience in fitting locks of all types, not just Smart Locks. It is a free service we offer, and with just some photos and a few minutes of your time you can get expert advice and product recommendations tailored precisely to suit your needs.
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