
Metal Plate for Magnetic Phone Mount - 4 Packs Universal Ultra Thin Black Metal Disc w/Strong 3M Adhesive Sticker - Replacement Accessory Kit - 2 Rectangle (1.75"x2.5") & 2 Round (1.5"x1.5")
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AI Verdict
This 4-pack of 0.02mm thin manganese steel plates with 3M adhesive is for anyone needing to adapt a smartphone for a magnetic car mount.
These metal plates are a solid choice if you understand they're just the plates and you're okay with the wireless charging workaround. The 3M adhesive and 0.02mm thickness are exactly what you want for a low-profile, secure attachment to a phone case. Just don't expect to slap it directly on a ceramic phone back and have it stay put, or charge wirelessly without some planning.
If wireless charging is non-negotiable, look for phone cases with integrated magnetic rings designed for MagSafe-compatible mounts, which often allow charging through the case.
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Pros
- Includes two 1.75"x2.5" rectangular and two 1.5"x1.5" round plates, offering shape options for different phone or case sizes.
- The 3M double-sided adhesive provides strong attachment, securing your device even on rough roads.
- Plates are less than 0.02 mm thick, adding minimal bulk to your phone or case.
- Installation takes only 1-2 minutes.
- Leaves no marks or residuals when removed from a phone or case.
- Backed by GradCap’s Lifetime Tech Support and a 1-Year Warranty.
Cons
- Metal plates interfere with wireless charging; you'll need to remove your phone case if the plate is attached to it for wireless charging.
- Adhesion may be unreliable on non-flat or rubberized phone cases, or certain phone back materials like ceramic.
- These are only metal plates and do not include the magnetic car mount itself.
- Plates must be positioned carefully to avoid blocking the wireless charging coil, or wireless charging will not function.
Dimension Scores
The metal plates can block wireless charging, requiring removal of the phone case for charging.
Made from premium-quality manganese steel and less than 0.02 mm thick, indicating a durable yet thin construction.
Designed for universal compatibility with all smartphone models and various magnetic car mounts.
At less than 0.02 mm thick, the plates add negligible bulk or weight to a phone or case.
Best For
- Drivers who already own a magnetic car mount and need replacement or additional phone plates.
- Users with multiple phones or cases they want to use with a single magnetic mount.
- Anyone needing to secure a smartphone in a vehicle on various road conditions.
Not Recommended For
- Users who rely heavily on wireless charging and prefer not to remove their phone case.
- Phones with ceramic or rubberized backs where adhesive might not hold reliably.
- Individuals expecting a complete magnetic mounting solution, as this product only provides the metal plates.
Watch Out For
- Wireless charging is blocked if the metal plate covers the charging coil; you'll need to stick it on your case and remove the case to charge wirelessly.
- Adhesive might not stick to all phone back materials, specifically ceramic, leading to the phone falling.
- The plates are made of iron and are not magnets themselves, so they require an existing magnetic mount to function.
- Requires a flat, non-rubberized surface for optimal adhesion; rough or textured surfaces may cause the plate to detach.
Full Specifications
| ASIN | B07FRHTYCJ |
| Brand | GradCap |
| Color | Black |
| Department | Driver |
| Form Factor | For Phone Case |
| Item Weight | 1.76 ounces |
| Manufacturer | GradCap |
| Mounting Type | Vent |
| Special features | Metallic Sheet, Metallic Sticker, Slim Fit, Ultra Thin, Universal |
| Item model number | GCMPCM18COMPO |
| Compatible Devices | Universal for all smartphone models |
| Product Dimensions | 1.75 x 0.01 x 2.6 inches |
| Other display features | Wireless |
| Is Discontinued By Manufacturer | No |
| Wireless communication technologies | Wireless |
What Buyers Say
The biggest thing to know about these GradCap metal plates is that while they're super thin at 0.02mm and stick like crazy with 3M adhesive, they're going to mess with your wireless charging. You'll either need to strategically place them away from the charging coil or just plan on popping your case off to wirelessly charge. Some users have found the adhesive struggles on non-flat or ceramic phone backs, so a smooth case is your best bet. They're not magnets, just the metal part for your existing magnetic mount.
“Look, these plates are fine if you know what you're getting. They stick, they're thin, but yeah, my phone won't charge wirelessly with it on unless I take the case off, which is a pain. Still, it holds my phone in the car, so whatever.”
Common Praise
- The 3M adhesive holds the phone securely, even on bumpy roads.
- Plates are very thin, adding minimal thickness to the phone or case.
- Easy to install in 1-2 minutes.
- Leaves no residue when removed.
- Includes both rectangular and round shapes for different preferences.
Common Complaints
- Blocks wireless charging if placed over the charging coil.
- Adhesion can fail on certain phone materials like ceramic or rubberized cases, causing the phone to fall.
- Requires careful placement to avoid wireless charging interference.
- Some users forget these are just plates, not the actual magnets for mounting.
Ownership Tips
- Even with strong adhesive, the plate can peel off if the phone or case surface isn't perfectly smooth or clean.
- Experimenting with plate placement is key if you want to retain some wireless charging functionality.
- The thinness means they don't snag on pockets, which is a small but appreciated detail.
- Having both round and rectangular options is useful for fitting different phone sizes or case designs without looking awkward.
Frequently Asked Questions
Will these metal plates interfere with wireless charging?
Yes, metal plates can interfere with wireless charging. It's recommended to stick the plate to your phone case and remove the case when wireless charging is needed.
Are these plates magnetic themselves?
No, these are metal discs made of manganese steel that are attracted to magnets; they are not magnets themselves.
Can I stick these directly to my phone?
Yes, you can stick them directly to your phone, but ensure the surface is flat and non-rubberized for the 3M adhesive to work effectively.
What if the plate doesn't stick to my phone or case?
The adhesive works best on flat, non-rubberized surfaces. If your phone has a ceramic back or a textured case, adhesion might be an issue, and the plate could detach.
How many plates come in the pack?
The pack includes four metal plates: two rectangular (1.75"x2.5") and two round (1.5"x1.5").
Buying Guide
When you're looking at metal plates for magnetic phone mounts, you're essentially buying the 'other half' of your car mount system. These plates aren't magnetic themselves; they're what your magnetic mount sticks to. The key things are how well they stick to your phone or case, how thin they are so they don't add bulk, and whether they'll mess with your phone's wireless charging. You want a strong adhesive that won't leave gunk behind, and a plate thin enough to be barely noticeable. Just remember, metal and wireless charging coils don't mix well, so be prepared for that trade-off.
3M Adhesive Sticker
This is what keeps the plate attached to your phone or case. A strong, reputable adhesive like 3M means your phone won't go flying when you hit a bump, and it should remove cleanly without leaving sticky residue.
Ultra Thin (less than 0.02 mm)
The thinner the plate, the less noticeable it is on your phone or inside your case. This prevents your phone from feeling bulky or wobbling on flat surfaces.
Manganese Steel Material
This is the material that the magnets in your car mount will attract. Manganese steel is a common choice for its magnetic properties and durability, ensuring a secure hold.
Alternatives
If wireless charging is a must-have, search for phone cases with integrated magnetic rings that are specifically designed to be MagSafe-compatible, or look for magnetic mounts that use a different attachment method entirely, like a clamp.



