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MP 16x8/4x3 / N38 - ring magnet

ring magnet

Catalog no 030396

GTIN/EAN: 5906301812333

5.00
Load capacity 2.78 kg / 27.29 N Magnetic Induction 217.61 mT / 2176 Gs
Diameter
16 mm [±0,1 mm]
internal diameter Ø
8/4 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
4.24 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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2.03 zł net / pcs

2.50 zł with VAT (23% VAT) / pcs

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Frequently asked questions

What is the hole in a ring magnet for?
For mounting on a screw or a shaft. The bore may be cylindrical or countersunk for a screw head. The hole removes magnet volume, so a ring holds less than a disc of the same outside diameter.
What is the polarisation?
Axial as standard — poles on the flat faces of the ring. Diametrical polarisation is made to order.
What sizes are available?
Outside diameter from 5 to 62 mm from stock. To order up to 200 mm outside diameter, 180 mm bore and 40 mm height, with a lead time of 25–35 days.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical - MP 16x8/4x3 / N38 - ring magnet

Specification / characteristics - MP 16x8/4x3 / N38 - ring magnet

properties
properties values
Cat. no. 030396
GTIN/EAN 5906301812333
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter 16 mm [±0,1 mm]
internal diameter Ø 8/4 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 4.24 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.78 kg / 27.29 N
Magnetic Induction ~ ? 217.61 mT / 2176 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 16x8/4x3 / N38 - ring magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 310 °C
Curie Temperature TF 590 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Technical modeling of the magnet - data

The following values are the outcome of a mathematical simulation. Results are based on algorithms for the class Nd2Fe14B. Actual parameters might slightly differ. Please consider these calculations as a supplementary guide when designing systems.

Table 1: Static force (force vs distance) - power drop
MP 16x8/4x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1882 Gs
188.2 mT
 2.78 kg / 6.13 LBS
2780.0 g / 27.3 N
 warning
1 mm 1746 Gs
174.6 mT
 2.39 kg / 5.27 LBS
2392.4 g / 23.5 N
 warning
2 mm 1561 Gs
156.1 mT
 1.91 kg / 4.22 LBS
1913.9 g / 18.8 N
 weak grip
3 mm 1357 Gs
135.7 mT
 1.45 kg / 3.19 LBS
1445.8 g / 14.2 N
 weak grip
5 mm 969 Gs
96.9 mT
 0.74 kg / 1.63 LBS
737.7 g / 7.2 N
 weak grip
10 mm 387 Gs
38.7 mT
 0.12 kg / 0.26 LBS
117.4 g / 1.2 N
 weak grip
15 mm 171 Gs
17.1 mT
 0.02 kg / 0.05 LBS
22.9 g / 0.2 N
 weak grip
20 mm 87 Gs
8.7 mT
 0.01 kg / 0.01 LBS
5.9 g / 0.1 N
 weak grip
30 mm 30 Gs
3.0 mT
 0.00 kg / 0.00 LBS
0.7 g / 0.0 N
 weak grip
50 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
Pulling power drops sharply with every subsequent millimeter of distance. Note that even a microscopic distance (e.g., contamination, paint, dust) strongly reduces the pull force. Magnets work strongest at the point of direct contact; air break nullifies the power. See how rapidly the parameters fall, when the magnet does not touch directly to the steel surface. When planning the mounting, avoid redundant distances.

Table 2: Sliding force (wall)
MP 16x8/4x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.56 kg / 1.23 LBS
556.0 g / 5.5 N
1 mm Stal (~0.2) 0.48 kg / 1.05 LBS
478.0 g / 4.7 N
2 mm Stal (~0.2) 0.38 kg / 0.84 LBS
382.0 g / 3.7 N
3 mm Stal (~0.2) 0.29 kg / 0.64 LBS
290.0 g / 2.8 N
5 mm Stal (~0.2) 0.15 kg / 0.33 LBS
148.0 g / 1.5 N
10 mm Stal (~0.2) 0.02 kg / 0.05 LBS
24.0 g / 0.2 N
15 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
The table below presents the approximate shear load necessary to cause the shifting of the magnet down against a upright metal surface (considering standard friction coefficient). The holding force varies with the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 16x8/4x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.83 kg / 1.84 LBS
834.0 g / 8.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.56 kg / 1.23 LBS
556.0 g / 5.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.28 kg / 0.61 LBS
278.0 g / 2.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
When hanging a element on a upright surface (e.g., a car body), it will only hold only about 1/5 of its nominal power. Gravitational force as well as a low friction coefficient influence the fact that magnets slip faster than they detach. Want to create a wall mount? Consider that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the holder will slip down under a much lighter weight. Utilizing a rubberized coating can drastically improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MP 16x8/4x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.28 kg / 0.61 LBS
278.0 g / 2.7 N
1 mm
25%
 0.70 kg / 1.53 LBS
695.0 g / 6.8 N
2 mm
50%
 1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
3 mm
75%
 2.09 kg / 4.60 LBS
2085.0 g / 20.5 N
5 mm
100%
 2.78 kg / 6.13 LBS
2780.0 g / 27.3 N
10 mm
100%
 2.78 kg / 6.13 LBS
2780.0 g / 27.3 N
11 mm
100%
 2.78 kg / 6.13 LBS
2780.0 g / 27.3 N
12 mm
100%
 2.78 kg / 6.13 LBS
2780.0 g / 27.3 N
A thin metal plate cannot absorb the entire magnetic field, which squanders power of the holder. If you install a neodymium to a thin surface, the magnetism will pass right through and the holding will be smaller. To squeeze the maximum of this magnet's potential, you need a suitably thick piece of steel. The saturation effect means that on sheet metal structures (e.g., appliance housings), the product holds weaker. We recommend selecting the steel thickness according to the table below.

Table 5: Working in heat (material behavior) - thermal limit
MP 16x8/4x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.78 kg / 6.13 LBS
2780.0 g / 27.3 N
 OK
40 °C -2.2% 2.72 kg / 5.99 LBS
2718.8 g / 26.7 N
 OK
60 °C -4.4% 2.66 kg / 5.86 LBS
2657.7 g / 26.1 N
80 °C -6.6% 2.60 kg / 5.72 LBS
2596.5 g / 25.5 N
100 °C -28.8% 1.98 kg / 4.36 LBS
1979.4 g / 19.4 N
Standard neodymium magnets lose parameters past the thermal threshold. Watch out for overheating – high temperature can permanently demagnetize this magnet. With every degree above norm, the neodymium's power momentarily lowers. Refrain from using this magnet close to heaters exceeding its working range. Exceeding the critical threshold will cause permanent loss of magnetism.
*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) may lose charge permanently sooner compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 16x8/4x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 3.50 kg / 7.71 LBS
3 330 Gs
0.52 kg / 1.16 LBS
525 g / 5.1 N
 N/A
1 mm 3.28 kg / 7.23 LBS
3 644 Gs
0.49 kg / 1.08 LBS
492 g / 4.8 N
 2.95 kg / 6.51 LBS
~0 Gs
2 mm 3.01 kg / 6.64 LBS
3 492 Gs
0.45 kg / 1.00 LBS
452 g / 4.4 N
 2.71 kg / 5.97 LBS
~0 Gs
3 mm 2.71 kg / 5.98 LBS
3 316 Gs
0.41 kg / 0.90 LBS
407 g / 4.0 N
 2.44 kg / 5.39 LBS
~0 Gs
5 mm 2.11 kg / 4.64 LBS
2 920 Gs
0.32 kg / 0.70 LBS
316 g / 3.1 N
 1.90 kg / 4.18 LBS
~0 Gs
10 mm 0.93 kg / 2.05 LBS
1 939 Gs
0.14 kg / 0.31 LBS
139 g / 1.4 N
 0.84 kg / 1.84 LBS
~0 Gs
20 mm 0.15 kg / 0.33 LBS
773 Gs
0.02 kg / 0.05 LBS
22 g / 0.2 N
 0.13 kg / 0.29 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
98 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
60 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.00 LBS
40 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.00 LBS
27 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.00 LBS
20 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
100 mm 0.00 kg / 0.00 LBS
14 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two strong neodymiums attract each other from a wider radius than a neodymium and metal combination. The connection of two magnets creates a more powerful interaction and a further horizon of operation. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the impact force is massive. The repulsion force is slightly lower than the attraction, but still impressive.
*The magnetic induction in repulsion mode reaches ~0 Gs at the geometric center between the magnets (due to field cancellation).
Attention: Results show friction force of dual same neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - precautionary measures
MP 16x8/4x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Extremely neodym field poses a real danger to electronics and medical implants. These neodymiums produce a flux that disrupts operation of sensitive medical devices. Notice: the invisible magnetic field acts through matter and glass. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MP 16x8/4x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.78 km/h
(6.88 m/s)
 0.10 J
30 mm 25.22 km/h
(7.01 m/s)
 0.10 J
50 mm 25.23 km/h
(7.01 m/s)
 0.10 J
100 mm 25.23 km/h
(7.01 m/s)
 0.10 J
NdFeB products are delicate – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Kinetic force can cause material chips or dangerous crushing to skin. Be sure to control the product during installation so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when playing with powerful specimens.

Table 9: Corrosion resistance
MP 16x8/4x3 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Note the thickness of the protective layer.

Table 10: Electrical data (Pc)
MP 16x8/4x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 743 Mx 37.4 µWb
Pc Coefficient 0.24 Low (Flat)
Total magnetic flux passing through the pole surface. Essential parameter when building generators and motors. Pc value determines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 16x8/4x3 / N38

Environment Effective steel pull Effect
Air (land) 2.78 kg Standard
Water (riverbed) 3.18 kg
(+0.40 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains just ~20% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Heat tolerance

*For N38 grade, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.24

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Engineering data and GPSR

Chemical composition

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Ecology and recycling (GPSR)

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 030396-2026
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The ring-shaped magnet MP 16x8/4x3 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 2.78 kg works great as a cabinet closure, speaker holder, or spacer element in devices.
This is a crucial issue when working with model MP 16x8/4x3 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.
These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.
The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Always check that the screw head is not larger than the outer diameter of the magnet (16 mm), so it doesn't protrude beyond the outline.
The presented product is a ring magnet with dimensions Ø16 mm (outer diameter) and height 3 mm. The pulling force of this model is an impressive 2.78 kg, which translates to 27.29 N in newtons. The mounting hole diameter is precisely 8/4 mm.
These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Advantages and disadvantages of rare earth magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their strength is durable, and after approximately ten years it drops only by ~1% (according to research),
  • Neodymium magnets are characterized by extremely resistant to magnetic field loss caused by external interference,
  • The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets generate maximum magnetic induction on a their surface, which increases force concentration,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of exact forming and adapting to precise needs,
  • Significant place in advanced technology sectors – they serve a role in mass storage devices, electric drive systems, medical equipment, and industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Limitations

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing nuts in the magnet and complicated forms - preferred is cover - magnet mounting.
  • Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products can complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price is relatively high,

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what contributes to it?

The force parameter is a measurement result executed under specific, ideal conditions:
  • with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • with a cross-section no less than 10 mm
  • with a plane free of scratches
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

What influences lifting capacity in practice

Please note that the magnet holding will differ subject to the following factors, in order of importance:
  • Clearance – the presence of foreign body (paint, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface structure – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the load capacity.

Warnings
Keep away from computers

Avoid bringing magnets near a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Heat warning

Do not overheat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Nickel allergy

Certain individuals suffer from a contact allergy to nickel, which is the standard coating for NdFeB magnets. Frequent touching can result in a rash. We suggest use protective gloves.

Shattering risk

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets leads to them breaking into small pieces.

Danger to the youngest

NdFeB magnets are not toys. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates urgent medical intervention.

Bodily injuries

Pinching hazard: The pulling power is so immense that it can cause hematomas, crushing, and even bone fractures. Use thick gloves.

Flammability

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Safe operation

Be careful. Neodymium magnets attract from a distance and connect with massive power, often quicker than you can move away.

Medical implants

Life threat: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Impact on smartphones

Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.

Caution! Looking for details? Read our article: Why are neodymium magnets dangerous?