Short answer: N52 describes the magnet material, not how well a mount holds your phone. Pull force is measured steel-to-magnet with nothing in between, and the moment you add a phone case the real number drops. The only figure that matters is what it holds through your case, at the angle you mount it, while you move.
What N52 actually means
Neodymium magnets are graded N35 through N52. The number tracks maximum energy product: how much magnetic energy the material stores per unit of volume. N52 is at the top of the commercial scale, so for a given size it is the strongest common option. It says nothing about the shape of the field, the surface area of the contact face, or what sits between the magnet and the steel.
The magnetic phone mount uses built-in N52 magnets behind a polycarbonate panel on a CNC-machined aluminium body, with a 62 mm magnetic face on either clip. That face size is the number people underestimate: a wider face spreads the hold and resists twisting far better than a stronger magnet with a small contact patch.
Why pull force numbers mislead
Pull force is measured with a thick steel plate, flush against the magnet, pulled straight away. Three things break that in real life:
- Air gap. Force falls off fast with distance. A 2 mm case does more damage than most people expect.
- Direction. Sliding a phone sideways off a face takes a fraction of the force needed to pull it straight off. Vibration is a sideways load.
- What you attach. A magnet ring in a case is a small ring of steel, not a plate. It is the ring that sets the limit, not the mount.
The ten-second test
Mount it where you will use it. Attach the phone in the case you actually carry. Then, in order: press it flat, tug straight out, tug sideways, and give the mount two firm slaps with the flat of your hand. If it survives the sideways tug and the slaps, it will survive a commute. If it only survives the straight pull, it is a desk mount.
This is also why the phone mount ships with a coiled safety tether with a clip at each end. Holding force depends on the case, so anything active gets the tether. That is not a hedge; it is how magnetic mounts are used properly.
Different jobs, different magnets
| Product | Holds | What it is not |
|---|---|---|
| Phone mount | Phones and cases with a magnet ring, small steel bits, keys | Not a clamp: use the tether when moving |
| Retention catch | Ferrous steel objects against the body, on webbing or a belt | Not a sling and not a safe. Aluminium, polymer and stainless are not held |
| Handgun mount | A compatible handgun by the slide, on a solid surface | A mounting point, not a safe. It does not lock anything up |
The material catch nobody mentions
Magnets hold ferrous steel. They do not hold aluminium, polymer, titanium or most stainless. A stainless tool that sticks to one magnet and not another is not a quality difference: the two are different stainless families, and only one is magnetic. Check the object, not the mount.
Keeping a magnetic face working
Grit and steel filings on the face are what actually kill a mount. They create an air gap and scratch whatever you set on it. Wipe the face with a dry cloth, keep it clear of metal dust, and never put solvent on a contact surface.
FAQ
Is N52 always better than N42?
For the same magnet size, yes. But a larger N42 face often out-holds a small N52 one, because contact area and geometry matter as much as grade.
Will a magnet wipe my phone or credit card?
Phones, no. Magnetic-stripe cards and hotel keys, yes. Keep them off the face.
Does a thicker case kill the hold?
It weakens it, sometimes a lot. Use a case with a built-in ring, or fit the adhesive ring included in the box.
The full set is in Mounts & Hardware.
Products shown are concept renders of the production design. Measurements are the supplier's published figures for the production unit and may vary slightly. Measured holding force for the handgun mount is published once supplier testing is done.