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MW 14.9x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010023

GTIN/EAN: 5906301810223

5.00

Diameter Ø

14.9 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

13.08 g

Magnetization Direction

→ diametrical

Load capacity

7.60 kg / 74.57 N

Magnetic Induction

496.78 mT / 4968 Gs

Coating

[NiCuNi] Nickel

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8.24 ZŁ with VAT / pcs + price for transport

6.70 ZŁ net + 23% VAT / pcs

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Technical data of the product - MW 14.9x10 / N38 - cylindrical magnet

Specification / characteristics - MW 14.9x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010023
GTIN/EAN 5906301810223
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 Ø 14.9 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 13.08 g
Magnetization Direction → diametrical
Load capacity ~ ? 7.60 kg / 74.57 N
Magnetic Induction ~ ? 496.78 mT / 4968 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 14.9x10 / N38 - cylindrical 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 312 - 380 °C
Curie Temperature TF 593 - 716 °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

Engineering modeling of the assembly - report

Presented information constitute the outcome of a mathematical calculation. Results were calculated on models for the class Nd2Fe14B. Actual parameters may differ from theoretical values. Please consider these calculations as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - power drop
MW 14.9x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4965 Gs
496.5 mT
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
 strong
1 mm 4309 Gs
430.9 mT
 5.72 kg / 12.62 pounds
5722.6 g / 56.1 N
 strong
2 mm 3660 Gs
366.0 mT
 4.13 kg / 9.10 pounds
4129.1 g / 40.5 N
 strong
3 mm 3063 Gs
306.3 mT
 2.89 kg / 6.38 pounds
2892.7 g / 28.4 N
 strong
5 mm 2098 Gs
209.8 mT
 1.36 kg / 2.99 pounds
1356.5 g / 13.3 N
 low risk
10 mm 838 Gs
83.8 mT
 0.22 kg / 0.48 pounds
216.5 g / 2.1 N
 low risk
15 mm 389 Gs
38.9 mT
 0.05 kg / 0.10 pounds
46.6 g / 0.5 N
 low risk
20 mm 207 Gs
20.7 mT
 0.01 kg / 0.03 pounds
13.2 g / 0.1 N
 low risk
30 mm 78 Gs
7.8 mT
 0.00 kg / 0.00 pounds
1.9 g / 0.0 N
 low risk
50 mm 20 Gs
2.0 mT
 0.00 kg / 0.00 pounds
0.1 g / 0.0 N
 low risk
Grip strength drops significantly with every subsequent millimeter of spacing. Keep in mind that even a very thin break (e.g., dirt, paint, dust) strongly diminishes the holding power. Neodymiums work optimally during direct contact; gap nullifies the force. See how rapidly the parameters drop, when the magnet does not touch directly to the steel surface. When planning the assembly, avoid additional spacers.

Table 2: Shear hold (wall)
MW 14.9x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.52 kg / 3.35 pounds
1520.0 g / 14.9 N
1 mm Stal (~0.2) 1.14 kg / 2.52 pounds
1144.0 g / 11.2 N
2 mm Stal (~0.2) 0.83 kg / 1.82 pounds
826.0 g / 8.1 N
3 mm Stal (~0.2) 0.58 kg / 1.27 pounds
578.0 g / 5.7 N
5 mm Stal (~0.2) 0.27 kg / 0.60 pounds
272.0 g / 2.7 N
10 mm Stal (~0.2) 0.04 kg / 0.10 pounds
44.0 g / 0.4 N
15 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
The following data calculates the theoretical weight limit needed to start the slippage of the magnet vertically along a upright steel wall (assuming typical friction). The holding force varies with the distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MW 14.9x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.28 kg / 5.03 pounds
2280.0 g / 22.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.52 kg / 3.35 pounds
1520.0 g / 14.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.76 kg / 1.68 pounds
760.0 g / 7.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.80 kg / 8.38 pounds
3800.0 g / 37.3 N
When mounting a element on a upright plane (e.g., a board), it will only hold just about 20%-30% of its maximum pull force. Gravity as well as a weak degree of grip influence the fact that magnets slip easier than they pull off. Planning a wall mount? Remember that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the element will give way down under a significantly smaller load. Using a rubber layer can effectively increase the grip.

Table 4: Material efficiency (saturation) - power losses
MW 14.9x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.76 kg / 1.68 pounds
760.0 g / 7.5 N
1 mm
25%
 1.90 kg / 4.19 pounds
1900.0 g / 18.6 N
2 mm
50%
 3.80 kg / 8.38 pounds
3800.0 g / 37.3 N
3 mm
75%
 5.70 kg / 12.57 pounds
5700.0 g / 55.9 N
5 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
10 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
11 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
12 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
A thin metal plate is incapable of take in the full magnetic flux, which wastes potential of the magnet. Should you mount a strong magnet to a weak sheet, the flux will pass right through and the attraction force will be weaker. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid backing of metal. The material oversaturation causes that on thin elements (e.g., car bodies), the product shows lower pull force. We recommend selecting the steel thickness from these parameters.

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 14.9x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
 OK
40 °C -2.2% 7.43 kg / 16.39 pounds
7432.8 g / 72.9 N
 OK
60 °C -4.4% 7.27 kg / 16.02 pounds
7265.6 g / 71.3 N
 OK
80 °C -6.6% 7.10 kg / 15.65 pounds
7098.4 g / 69.6 N
100 °C -28.8% 5.41 kg / 11.93 pounds
5411.2 g / 53.1 N
Standard neodymium magnets change their properties parameters after exceeding the maximum temperature. Protect against heat – excessive heat can permanently damage this product. With increasing heat, the neodymium's capacity momentarily drops. Refrain from using this product near heat sources higher than its operating temperature limit. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.
*Technical advisory: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) risk losing magnetic properties sooner compared to rod magnets. The danger warning in the table signals a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 14.9x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 26.50 kg / 58.43 pounds
5 802 Gs
3.98 kg / 8.76 pounds
3975 g / 39.0 N
 N/A
1 mm 23.16 kg / 51.05 pounds
9 283 Gs
3.47 kg / 7.66 pounds
3474 g / 34.1 N
 20.84 kg / 45.95 pounds
~0 Gs
2 mm 19.96 kg / 44.00 pounds
8 617 Gs
2.99 kg / 6.60 pounds
2993 g / 29.4 N
 17.96 kg / 39.60 pounds
~0 Gs
3 mm 17.03 kg / 37.54 pounds
7 959 Gs
2.55 kg / 5.63 pounds
2554 g / 25.1 N
 15.32 kg / 33.78 pounds
~0 Gs
5 mm 12.09 kg / 26.65 pounds
6 707 Gs
1.81 kg / 4.00 pounds
1813 g / 17.8 N
 10.88 kg / 23.99 pounds
~0 Gs
10 mm 4.73 kg / 10.43 pounds
4 196 Gs
0.71 kg / 1.56 pounds
710 g / 7.0 N
 4.26 kg / 9.39 pounds
~0 Gs
20 mm 0.76 kg / 1.66 pounds
1 676 Gs
0.11 kg / 0.25 pounds
113 g / 1.1 N
 0.68 kg / 1.50 pounds
~0 Gs
50 mm 0.02 kg / 0.04 pounds
245 Gs
0.00 kg / 0.01 pounds
2 g / 0.0 N
 0.01 kg / 0.03 pounds
~0 Gs
60 mm 0.01 kg / 0.01 pounds
156 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
105 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
74 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
54 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
41 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two strong neodymiums interact from a wider radius than a magnet and steel setup. The connection of two magnets creates a more powerful interaction and a wider radius of performance. Want to build a strong closure? Use a pair of magnets instead of one magnet and a steel. Be careful that when attracting two neodymiums, the collision energy is extreme. The levitation is a bit weaker than the connection force, but still large.
*Field value for N-N configuration is approximately ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Note: Calculations demonstrate sliding force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - precautionary measures
MW 14.9x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.5 cm
Hearing aid 10 Gs (1.0 mT) 6.5 cm
Timepiece 20 Gs (2.0 mT) 5.5 cm
Mobile device 40 Gs (4.0 mT) 4.0 cm
Car key 50 Gs (5.0 mT) 4.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm
Powerful magnet radiation is a large risk to electronic devices and medical implants. These neodymiums generate a field that prevents correct functioning of sensitive medical devices. Be aware: the unseen radiation penetrates the body and plastic. Exceptional care must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, speakers, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MW 14.9x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.74 km/h
(6.87 m/s)
 0.31 J
30 mm 42.11 km/h
(11.70 m/s)
 0.89 J
50 mm 54.36 km/h
(15.10 m/s)
 1.49 J
100 mm 76.87 km/h
(21.35 m/s)
 2.98 J
NdFeB products are prone to chipping – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely turns into a projectile. Striking energy can cause material chips or injury to skin. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the metal. A collision at high speed means shattering of the neodymium. Wear safety glasses when handling with powerful specimens.

Table 9: Corrosion resistance
MW 14.9x10 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 14.9x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 8 732 Mx 87.3 µWb
Pc Coefficient 0.71 High (Stable)
Total magnetic flux emitted by the pole surface. Essential parameter in coil applications as well as sensors. Pc value defines the working geometry.

Table 11: Submerged application
MW 14.9x10 / N38

Environment Effective steel pull Effect
Air (land) 7.60 kg Standard
Water (riverbed) 8.70 kg
(+1.10 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.
1. Wall mount (shear)

*Caution: On a vertical wall, the magnet holds just a fraction of its max power.

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) significantly limits the holding force.

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71

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%
Environmental data
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: 010023-2026
Magnet Unit Converter
Magnet pull force
Field Strength
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The offered product is an incredibly powerful cylinder magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø14.9x10 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 7.60 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 74.57 N with a weight of only 13.08 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 14.9.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are suitable for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø14.9x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø14.9x10 mm, which, at a weight of 13.08 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 7.60 kg (force ~74.57 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 14.9 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Pros

Apart from their strong magnetic energy, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
  • Neodymium magnets prove to be extremely resistant to magnetic field loss caused by external interference,
  • The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
  • The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Considering the potential of flexible forming and customization to unique solutions, neodymium magnets can be created in a wide range of shapes and sizes, which increases their versatility,
  • Versatile presence in high-tech industry – they find application in HDD drives, motor assemblies, advanced medical instruments, also complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Limitations

Disadvantages of NdFeB magnets:
  • At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated shapes.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Best holding force of the magnet in ideal parameters – what affects it?

The lifting capacity listed is a theoretical maximum value conducted under the following configuration:
  • with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • with a thickness of at least 10 mm
  • characterized by lack of roughness
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction perpendicular to the plane
  • at ambient temperature room level

Lifting capacity in real conditions – factors

Real force impacted by specific conditions, mainly (from priority):
  • Air gap (between the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Direction of force – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be lost into the air.
  • Material composition – different alloys attracts identically. Alloy additives weaken the attraction effect.
  • Surface finish – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.

Warnings
Keep away from electronics

Navigation devices and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Maximum temperature

Regular neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.

Skin irritation risks

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation happens, immediately stop handling magnets and use protective gear.

Choking Hazard

Strictly keep magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are fatal.

Flammability

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Eye protection

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Health Danger

Individuals with a ICD must keep an absolute distance from magnets. The magnetic field can stop the functioning of the implant.

Bone fractures

Pinching hazard: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

Powerful field

Exercise caution. Neodymium magnets attract from a distance and snap with huge force, often faster than you can move away.

Cards and drives

Equipment safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Attention! More info about risks in the article: Safety of working with magnets.