Master Lock Magnetic Key Holder – Weatherproof Spare Key Storage for Garages, Sheds, and Patio Doors
Master Lock Magnetic Key Holder – Weatherproof Spare Key Storage for Garages, Sheds, and Patio Doors
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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 hold up to rain, snow, and direct sunlight outdoors?
Yes. The rust-free plastic housing is specifically chosen over metal alternatives because it does not corrode, rust, or oxidize in outdoor weather. It handles rain, snow, humidity, and sun exposure far better than metal key boxes.
Can I use this on an outdoor steel cabinet or shed door?
Yes. Any steel surface works, including shed doors, steel utility cabinets, garage door frames, and outdoor storage units. The recessed magnet attaches flush and stays secure in everyday outdoor conditions.
Is this portable enough to bring camping or on RV trips?
Yes. The compact 4-11/16" long profile fits easily in a glove box, backpack, or RV storage compartment. You can attach it to a steel surface at any campsite or stop to keep a spare key accessible while traveling.
Will the magnet hold up against wind and vibration on a patio railing?
Yes. The recessed magnet sits flush against the steel and is engineered to stay put under normal weather conditions, including wind, rain, and casual contact. For higher-vibration locations, choose a flat, well-supported steel area.
Can I use this for an outdoor dining area or restaurant patio?
Yes. Restaurants and cafés with steel furniture or steel-framed patios can use this to securely store a spare key to storage areas, electrical panels, or outdoor closets, all without drilling or modifying the furniture.
Is this better than a metal key box for outdoor use?
Yes. Metal key boxes are prone to rust, corrosion, and paint chipping when left outdoors. The rust-free plastic housing of this Master Lock holder is designed specifically to resist those issues, lasting longer with less maintenance.
Will the sliding cover stay closed in windy or stormy weather?
Yes. The sliding cover has a built-in stop that holds it in place once closed, so wind, rain, and debris cannot easily work it open. Your key stays protected and dry inside.
Can I leave this outside year-round, or should I bring it in during winter?
You can leave it outside year-round. The rust-free plastic is designed for continuous outdoor exposure, and the recessed magnet performs in cold temperatures. Many users keep the same spare key inside for an entire year without issue.
Does this work on aluminum or non-steel surfaces outdoors?
No. The holder requires a steel (ferrous) surface for the magnet to attach. Aluminum, plastic, wood, and fiberglass outdoor furniture will not hold the magnet. Look for a steel post, frame, or hidden steel fixture nearby.
Can I use this on a steel utility box or meter box outdoors?
Yes, with caution. Steel utility boxes and meter boxes are valid magnetic surfaces, but you should check local regulations before attaching anything to utility company property. For your own steel utility cabinets, it is a great discreet storage spot.
Will a wet key inside the case cause rust on the key itself?
A key that goes in wet may show surface rust over time, but the housing itself will not rust and will not contribute to corrosion. For best results, dry the key before placing it inside.
Is the exterior color visible enough to spot, or will it blend in outdoors?
The matte black housing is designed to blend against dark steel surfaces like railings, beams, and appliance sides, making it discreet. If you want it to stand out for easier retrieval, place it in a known spot and note the location.
Can I attach this to a steel outdoor grill or appliance?
Yes. A steel grill cart, outdoor kitchen appliance, or steel patio cabinet is a valid surface. Just be aware that high heat from a grill can damage the plastic, so mount it on a cooler steel surface away from direct flame.
How well does it handle coastal or humid environments?
The rust-free plastic housing is well-suited to humid and coastal environments where metal alternatives would corrode quickly. Salt air and humidity will not degrade the housing or the recessed magnet over time.
Is it discreet enough to use at a vacation rental without guests noticing?
Yes. The compact, matte black case blends against most steel surfaces and is small enough to hide in plain sight. Many vacation home owners attach it to a less obvious steel fixture, such as a basement beam, garage frame, or under a steel railing.
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.
