Double-sided vs single-sided magnetic phone holders: which to stock

Published 2026-10-07 · 8 min read

Two holders can use the same N52 magnet and behave completely differently the moment the customer puts a rugged case on the phone. That gap is the difference between a listing that collects five-star reviews and one that collects returns, and it is decided by one thing: how the holder meets the phone.

How each type attaches

There are two layouts, and they are not variations of each other:

• Single-face (flat ring). An adhesive face sticks to the back of the phone or the case, and a magnet sits inside the ring. It is the thinnest option and the cheapest to start with, which is why most brands open with it.
• Double-sided. One face attaches to the phone or case and the outer face is magnetic. The body is slightly thicker because it carries two magnet sets, and the phone can hang on a magnetic car mount or desk stand while the holder is still attached.

That is the whole mechanical difference. Everything else — how it feels in the hand, which markets it sells into, how many units come back — follows from it.

What a thick case actually does

Magnetic force drops with distance. Every millimetre between the magnet and the steel plate (in the phone or in the plate you supply with the holder) costs grip. A slim case adds a fraction of a millimetre; a rugged case with a raised camera lip and two layers can add several.

Buyers notice it in two places: the phone slips sideways while the customer is scrolling in bed, and the phone slides down the vent mount when the car hits a bump. Both complaints have the same cause.

On our own ring holders we publish a measured figure: N52 magnets measuring about 4,100 GS on the assembled product. That number is measured on the finished holder, not on the raw magnet, because the two are not the same thing. What changes from customer to customer is the air gap their case creates — and that is something only a sample on their phone will settle.

The two layouts, side by side

When the single-face ring is the right answer

• Your customers mostly use slim or medium cases, or a MagSafe-style ring.
• You want the thinnest product and the lowest price point on the shelf.
• The holder is mainly used in the hand, one-handed, rather than on a mount.

None of that is a compromise. A flat ring done properly outsells a thicker one in markets where phones are carried bare or in thin shells, and it is the version that keeps your entry price competitive.

When to quote the double-sided model

• Rugged, waterproof or wallet cases are the norm in your market.
• Customers mount the phone in a car — vent, dashboard or windscreen magnet.
• Your listings already get questions or reviews about the holder not staying put.
• The phone is used outdoors, on a bike, in a workshop or in a vehicle all day.

The double-sided holder also removes a second purchase: because the outer face is magnetic, the phone hangs on any magnetic mount, so the customer does not need a magnetic case as well. That is usually the argument that closes the upgrade.

Does the customer need a magnetic case?

Not with a double-sided holder. The adhesive face goes onto the phone or the case they already own, and the magnet is on the outside where the mount can reach it. With a single-face ring, thinner cases and MagSafe-style rings give the most reliable result; with a very thick case, the honest recommendation is the double-sided model rather than a stronger magnet in the same thin body.

What to ask before you commit

1. Which case will your buyer actually use? Send us a photo of one and we will say which model to quote.
2. Is the magnet strength measured on the finished product? A grade such as N52 describes the raw material. Ask for the measured figure on the assembled holder.
3. Does the steel plate ship in the box? If the phone has no magnetic ring, the holder needs a plate in the package.
4. How thick is the body? A millimetre matters on a phone that lives in a pocket.
5. Can both models ship together? They can, and most of our customers carry both.

Stocking both without doubling your risk

Both models start at 50 pcs per model with custom logo, colour and packaging, so carrying both is a few hundred units rather than a container. The pattern our customers use is simple: the flat ring as the price entry point, the double-sided holder as the upsell for the buyers who come back complaining about thick cases.

Samples take 7–10 working days from a confirmed drawing, and mass production 7–12 days after you approve the sample, plus 3–5 days for packing and final inspection. We ship FOB Shenzhen, and both models run on existing tooling, so neither one needs a new mold investment.

How to test both before you commit to a range

You do not need a big order to find out which model suits your market. Take samples of both, fit them to the two cases your customers use most, and run the same five checks:

1. The one-hand scroll test. Scroll for a minute holding the phone one-handed. A flat ring on a slim case will not move; on a rugged case it may rotate or slide, and that is the single-face limit showing up.
2. The bump test in a car. Clip the vent mount in, drive over a speed bump and watch whether the phone travels downwards on the mount.
3. The pocket test. Both models live in a pocket for an afternoon; check the corners and the adhesive face afterwards.
4. The removal test. Take the phone off the magnetic mount twenty times and check that the adhesive face is still sitting flat on the case.
5. The listing photo test. Shoot both on the case you sell most, in the light your product photos use. This is the shot your buyer will judge the product on.

We ship samples of both models in one parcel, so this is one round of testing rather than two — and it answers a question no specification sheet can answer for your market.

Frequently asked questions