Master Lock Magnetic Key Box – Hidden Spare Key Storage with No Tools or Installation Needed
Master Lock Magnetic Key Box – Hidden Spare Key Storage with No Tools or Installation Needed
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Why you'll love it
- Trusted Master Lock brand with limited lifetime warranty provides peace of mind
- No tools or installation required - just place on any steel surface
- Sliding cover with built-in stop prevents the cover from being dropped or lost in use
- Rust-free plastic construction is more weather-resistant than metal alternatives
- Accommodates modern keys including those with bulky fobs, unlike tight metal boxes
Perfect for
- Hide a spare house key under a steel surface (railing, beam, appliance) for lockout emergencies
- Secure a backup key inside a steel cabinet or toolbox for quick retrieval
- Provide hidden key access to house sitters, pet sitters, or contractors
- Store a key fob-equipped spare key without damaging the fob
Product Information
Magnetic key holder is designed to hide a key outside or inside and will comfortably store 1-2 keys Magnetic key box securely attaches to any steel surface; Not intended for use on cars Magnetic key holder is constructed of a durable plastic that features a sliding cover with built-in stop to prevent cover from being dropped or misplaced Exterior dimensions: 4-11/16 inch (11.9 centimeter) L x 1-3/16 inch (2.9 centimeter) H x 2 inch (5.1 centimeter) W Interior dimensions: 3-3/4 inch (9.5 centimeter) L x 3/4 inch (1.9 centimeter) H x 1-1/2 inch (3.8 centimeter) W; 4.2 cubic inch (10.7 cubic centimeter) volume
The Master Lock 207D Portable Key Case features a rust-free, plastic construction for durability. The design of the case allows for proper fitment of most keys, including keys with a fob. The recessed magnet securely attaches and holds to any steel surface. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.
Frequently Asked Questions
Will the plastic case crack or fall off in freezing winter temperatures on my outdoor railing?
The Master Lock Magnetic Key Holder is built with durable rust-free plastic engineered to handle outdoor weather conditions, including cold and moisture. The recessed magnet holds firmly to steel surfaces in winter, keeping your spare key secure and accessible when you need it most.
Is the sliding cover safe to use so the small parts don't become a choking hazard for kids?
The cover is a single integrated piece that slides along the housing with a built-in stop, so it cannot be fully removed and dropped. While no key holder should be placed where very young children can access it, the design minimizes loose small parts compared to caps or lids on competing metal boxes.
Does the magnet stay strong enough on a painted steel surface to keep the holder from being knocked off?
The recessed magnet is designed to attach securely to any steel surface, including painted steel railings and beams. For best results, place it on a clean, flat steel area. The recessed design creates a flush, low-profile hold that resists bumps and casual contact.
Can I leave my spare key fob inside without damaging the battery or electronics over time?
Yes. The plastic housing is non-metallic and non-conductive, so it will not interfere with the signal or battery of a key fob. The 4.2 cubic inch interior is sized to fit 1-2 keys with bulky fobs without crushing or pressing against buttons.
How do I know the key inside is still dry and usable after weeks outdoors?
The rust-free plastic housing is more weather-resistant than metal alternatives, shielding your key from rain, snow, and humidity. Many users leave the same spare key inside for months without rust or corrosion, making it a reliable lockout backup in any season.
Is this a safer way to hide a spare key than under a doormat or in a fake rock?
Yes. Doormats and fake rocks are the first places intruders check, while a magnet-mounted case attached to a steel surface in a less obvious spot keeps your spare key out of plain sight. The discreet black housing blends against dark steel beams and railings.
Can I trust the Master Lock brand to back this product if something goes wrong?
Master Lock stands behind the Magnetic Key Holder with a limited lifetime warranty, giving you peace of mind that the brand will replace any product that fails due to defects. It is a trusted name in home security carried by major retailers.
Will the magnet scratch or damage the steel surface it attaches to?
No. The recessed magnet sits flush inside the housing, so only the plastic body contacts the steel surface. It will not scratch, mark, or leave residue on railings, beams, or appliance surfaces like some exposed metal key boxes can.
If I lose my only key, is this fast enough to get into my house in an emergency?
The whole point of this product is emergency lockout access. As long as you place the holder in a location you can reach without entering the home, you can retrieve your spare in seconds without calling a locksmith.
Should I worry about someone with a strong magnet stealing the holder?
The recessed magnet is designed to hold firm against normal handling, weather, and vibration, but no magnetic holder is theft-proof. We recommend placing it on a steel surface that is not publicly accessible, such as a backyard beam, basement joist, or inside a steel utility cabinet.
Is the plastic safe around pets who might chew it?
The hard plastic housing is durable and not designed to be a chew toy, but the small interior and smooth exterior make it less attractive to pets than fabric or soft materials. For extra safety, mount it on a steel surface that is out of your pet's reach.
Is this a fire-safe alternative to leaving a key under a mat that could be lost in a fire?
Yes. By keeping your spare key attached to a steel surface in a known, retrievable location, you avoid the risk of a mat, planter, or decorative item being displaced or destroyed. In an emergency, you or a responder can locate the key holder by going to the steel surface you chose.
Is this a good safety solution for seniors who live alone?
Yes. It provides a reliable, no-tools backup key for seniors who may have mobility issues or be more likely to lock themselves out. A family member can place it in an easy-to-reach steel location for peace of mind without installing any hardware.
How can I be sure no one will find my spare key in a hidden spot?
The holder is small, black, and designed to disappear against dark steel surfaces. Choose a less obvious location like a basement steel beam, the back of a steel appliance, or an interior steel cabinet rather than a visible front-door railing.
Does the limited lifetime warranty cover weather damage?
The limited lifetime warranty covers defects in materials and workmanship. The rust-free plastic housing is specifically engineered for outdoor use, so normal weather exposure is expected and the product is designed to perform in those conditions year after year.
How do I install the Master Lock Magnetic Key Holder?
Installation is instant and tool-free. Simply slide the cover open, place your spare key (or keys) inside, close the cover until the built-in stop engages, and place the holder on any clean, flat steel surface. The recessed magnet will hold it securely in place. You can move or relocate it at any time.
What size keys will fit inside the holder?
The interior measures 3-3/4" long x 3/4" tall x 1-1/2" wide (4.2 cubic inches total), which fits 1-2 standard keys, including modern keys with bulky fobs attached. Very large fobs or multiple fobs may not fit.
How do I open and close the cover without losing it?
The cover is integrated into the housing and slides along a track. The built-in stop prevents the cover from sliding all the way off, so you can open and close it with one hand without ever removing the cover completely.
Will this work on a steel front door?
Yes, but we recommend checking your door for an unobstructed flat steel area. Some steel doors have decorative panels, windows, or non-ferrous materials that prevent a strong magnetic hold. A steel door frame, threshold, or nearby steel railing may be a better option.
Does the holder work on stainless steel?
Yes, most stainless steel is magnetic and will hold the recessed magnet. However, some grades of stainless steel (such as 316 marine grade) are non-magnetic. Test with a refrigerator magnet first to confirm your surface will hold.
What is included in the box?
The box contains the Master Lock Magnetic Key Holder (1 unit for the 1-pack, or 3 units for the 3-pack). No tools, mounting hardware, or extra accessories are needed. Your spare key is not included.
Is it safe to leave a spare key outside in this holder long-term?
Yes, the rust-free plastic housing protects the key from rain, snow, and humidity far better than metal alternatives. For best security, choose a steel surface that is not visible from the street and that you can document in a private location list.
How do I clean the holder if it gets dirty outdoors?
Wipe it down with a damp cloth and mild soap, then dry it before opening. Avoid harsh chemicals or abrasives that could damage the matte finish. The plastic housing does not absorb dirt or odors.
What is the difference between a magnetic key holder and a combination lockbox?
A magnetic key holder attaches directly to a steel surface with no code to remember and no moving parts to fail, but it is only as secure as the discretion of its location. A combination lockbox hangs on a door handle or hook, requires a code, and is more visible but easier to share access with multiple people.
