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MP 25x7x9 / N38 - ring magnet

ring magnet

Catalog no 030195

GTIN/EAN: 5906301812128

5.00
Load capacity 14.82 kg / 145.39 N Magnetic Induction 362.13 mT / 3621 Gs
Diameter
25 mm [±0,1 mm]
internal diameter Ø
7 mm [±0,1 mm]
Height
9 mm [±0,1 mm]
Weight
30.54 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product specifications »

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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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Detailed specification - MP 25x7x9 / N38 - ring magnet

Specification / characteristics - MP 25x7x9 / N38 - ring magnet

properties
properties values
Cat. no. 030195
GTIN/EAN 5906301812128
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 25 mm [±0,1 mm]
internal diameter Ø 7 mm [±0,1 mm]
Height 9 mm [±0,1 mm]
Weight 30.54 g
Magnetization Direction ↑ axial
Load capacity ~ ? 14.82 kg / 145.39 N
Magnetic Induction ~ ? 362.13 mT / 3621 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x7x9 / N38 - ring magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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

Engineering modeling of the product - report

Presented information are the result of a engineering analysis. Values were calculated on models for the class Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs gap) - characteristics
MP 25x7x9 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5777 Gs
577.7 mT
 14.82 kg / 32.67 pounds
14820.0 g / 145.4 N
 critical level
1 mm 5310 Gs
531.0 mT
 12.52 kg / 27.60 pounds
12519.6 g / 122.8 N
 critical level
2 mm 4846 Gs
484.6 mT
 10.43 kg / 22.98 pounds
10425.5 g / 102.3 N
 critical level
3 mm 4397 Gs
439.7 mT
 8.59 kg / 18.93 pounds
8586.1 g / 84.2 N
 strong
5 mm 3576 Gs
357.6 mT
 5.68 kg / 12.52 pounds
5678.0 g / 55.7 N
 strong
10 mm 2073 Gs
207.3 mT
 1.91 kg / 4.21 pounds
1907.5 g / 18.7 N
 weak grip
15 mm 1231 Gs
123.1 mT
 0.67 kg / 1.48 pounds
673.1 g / 6.6 N
 weak grip
20 mm 773 Gs
77.3 mT
 0.27 kg / 0.58 pounds
265.0 g / 2.6 N
 weak grip
30 mm 356 Gs
35.6 mT
 0.06 kg / 0.12 pounds
56.2 g / 0.6 N
 weak grip
50 mm 115 Gs
11.5 mT
 0.01 kg / 0.01 pounds
5.9 g / 0.1 N
 weak grip
Magnetic force weakens significantly with every mm of spacing. Keep in mind that every additional insulation layer (e.g., contamination, paint, rust) significantly weakens the grip. Magnetic products operate optimally at the point of direct contact; distance drastically cuts the power. Observe how rapidly the load capacity plummet, when the magnet does not adhere directly to the metal substrate. When planning the mounting, eliminate additional spacers.

Table 2: Slippage force (wall)
MP 25x7x9 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.96 kg / 6.53 pounds
2964.0 g / 29.1 N
1 mm Stal (~0.2) 2.50 kg / 5.52 pounds
2504.0 g / 24.6 N
2 mm Stal (~0.2) 2.09 kg / 4.60 pounds
2086.0 g / 20.5 N
3 mm Stal (~0.2) 1.72 kg / 3.79 pounds
1718.0 g / 16.9 N
5 mm Stal (~0.2) 1.14 kg / 2.50 pounds
1136.0 g / 11.1 N
10 mm Stal (~0.2) 0.38 kg / 0.84 pounds
382.0 g / 3.7 N
15 mm Stal (~0.2) 0.13 kg / 0.30 pounds
134.0 g / 1.3 N
20 mm Stal (~0.2) 0.05 kg / 0.12 pounds
54.0 g / 0.5 N
30 mm Stal (~0.2) 0.01 kg / 0.03 pounds
12.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
The table below calculates the estimated force necessary to cause the downward movement of the magnet downwards on a upright metal surface (considering standard friction). The holding force is a function of the air gap between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MP 25x7x9 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
4.45 kg / 9.80 pounds
4446.0 g / 43.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.96 kg / 6.53 pounds
2964.0 g / 29.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.48 kg / 3.27 pounds
1482.0 g / 14.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
7.41 kg / 16.34 pounds
7410.0 g / 72.7 N
When hanging a element on a upright wall (e.g., a board), it will maintain only approx. 1/5 of nominal attraction strength. Gravity as well as a weak degree of grip cause that products slide down easier than they pull off. Planning a wall mount? Note that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the holder will slip down under a much lighter weight. Using a rubber layer can effectively increase the grip.

Table 4: Material efficiency (saturation) - sheet metal selection
MP 25x7x9 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 0.74 kg / 1.63 pounds
741.0 g / 7.3 N
1 mm
13%
 1.85 kg / 4.08 pounds
1852.5 g / 18.2 N
2 mm
25%
 3.71 kg / 8.17 pounds
3705.0 g / 36.3 N
3 mm
38%
 5.56 kg / 12.25 pounds
5557.5 g / 54.5 N
5 mm
63%
 9.26 kg / 20.42 pounds
9262.5 g / 90.9 N
10 mm
100%
 14.82 kg / 32.67 pounds
14820.0 g / 145.4 N
11 mm
100%
 14.82 kg / 32.67 pounds
14820.0 g / 145.4 N
12 mm
100%
 14.82 kg / 32.67 pounds
14820.0 g / 145.4 N
A too thin steel is unable to focus the full magnetic flux, which weakens actual performance of the magnet. Should you mount a strong magnet to a too thin substrate, the magnetism will pass right through and the pull force will drop sharply. To achieve the maximum of this magnet's potential, you require a sufficiently solid element of steel. The saturation phenomenon means that on delicate walls (e.g., thin profiles), the holder holds weaker. We advise picking the steel dimension from these parameters.

Table 5: Thermal stability (stability) - thermal limit
MP 25x7x9 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 14.82 kg / 32.67 pounds
14820.0 g / 145.4 N
 OK
40 °C -2.2% 14.49 kg / 31.95 pounds
14494.0 g / 142.2 N
 OK
60 °C -4.4% 14.17 kg / 31.23 pounds
14167.9 g / 139.0 N
 OK
80 °C -6.6% 13.84 kg / 30.52 pounds
13841.9 g / 135.8 N
100 °C -28.8% 10.55 kg / 23.26 pounds
10551.8 g / 103.5 N
Classic neodymiums irreversibly lose strength above the temperature limit. Protect against heat – excessive heat can irreversibly damage this magnet. With every degree above norm, the magnet's force briefly drops. Avoid using this magnet close to ovens higher than its operating temperature limit. Ignoring the limit will cause permanent loss of magnetism.
*Engineering note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low Pc) risk losing magnetic properties at lower temperatures compared to rod magnets. The danger warning in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MP 25x7x9 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 74.73 kg / 164.76 pounds
6 082 Gs
11.21 kg / 24.71 pounds
11210 g / 110.0 N
 N/A
1 mm 68.86 kg / 151.81 pounds
11 091 Gs
10.33 kg / 22.77 pounds
10329 g / 101.3 N
 61.97 kg / 136.63 pounds
~0 Gs
2 mm 63.13 kg / 139.18 pounds
10 620 Gs
9.47 kg / 20.88 pounds
9470 g / 92.9 N
 56.82 kg / 125.26 pounds
~0 Gs
3 mm 57.70 kg / 127.20 pounds
10 153 Gs
8.65 kg / 19.08 pounds
8654 g / 84.9 N
 51.93 kg / 114.48 pounds
~0 Gs
5 mm 47.77 kg / 105.31 pounds
9 238 Gs
7.17 kg / 15.80 pounds
7165 g / 70.3 N
 42.99 kg / 94.78 pounds
~0 Gs
10 mm 28.63 kg / 63.12 pounds
7 152 Gs
4.29 kg / 9.47 pounds
4295 g / 42.1 N
 25.77 kg / 56.81 pounds
~0 Gs
20 mm 9.62 kg / 21.21 pounds
4 145 Gs
1.44 kg / 3.18 pounds
1443 g / 14.2 N
 8.66 kg / 19.09 pounds
~0 Gs
50 mm 0.59 kg / 1.29 pounds
1 024 Gs
0.09 kg / 0.19 pounds
88 g / 0.9 N
 0.53 kg / 1.16 pounds
~0 Gs
60 mm 0.28 kg / 0.62 pounds
712 Gs
0.04 kg / 0.09 pounds
43 g / 0.4 N
 0.26 kg / 0.56 pounds
~0 Gs
70 mm 0.15 kg / 0.33 pounds
514 Gs
0.02 kg / 0.05 pounds
22 g / 0.2 N
 0.13 kg / 0.29 pounds
~0 Gs
80 mm 0.08 kg / 0.18 pounds
383 Gs
0.01 kg / 0.03 pounds
12 g / 0.1 N
 0.07 kg / 0.16 pounds
~0 Gs
90 mm 0.05 kg / 0.11 pounds
293 Gs
0.01 kg / 0.02 pounds
7 g / 0.1 N
 0.04 kg / 0.10 pounds
~0 Gs
100 mm 0.03 kg / 0.07 pounds
230 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
 0.03 kg / 0.06 pounds
~0 Gs
Two magnets interact from a significantly greater distance than a magnet and sheet combination. The setup of magnet-to-magnet produces a massive flux and a further horizon of action. Designing a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the pinch force is massive. The levitation is marginally weaker than the connection force, but still impressive.
*Flux density for N-N configuration drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
Important: Results refer to shear force of a pair of matching neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - warnings
MP 25x7x9 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 17.0 cm
Hearing aid 10 Gs (1.0 mT) 13.5 cm
Timepiece 20 Gs (2.0 mT) 10.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 8.0 cm
Remote 50 Gs (5.0 mT) 7.5 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm
A strong magnetic field is a serious hazard to electronics as well as pacemakers. These NdFeB products produce a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation penetrates the body and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, membranes, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MP 25x7x9 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.44 km/h
(6.51 m/s)
 0.65 J
30 mm 25.05 km/h
(6.96 m/s)
 0.74 J
50 mm 25.12 km/h
(6.98 m/s)
 0.74 J
100 mm 25.13 km/h
(6.98 m/s)
 0.74 J
Neodymium magnets are delicate – a violent impact against metal causes immediate chipping. Control the attraction moment – a magnet released freely speeds with massive force. Kinetic force can trigger coating fragments or dangerous crushing to fingers. Hold the magnet firmly during installation so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Coating parameters (durability)
MP 25x7x9 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MP 25x7x9 / N38

Parameter Value SI Unit / Description
Magnetic Flux 22 495 Mx 225.0 µWb
Pc Coefficient 1.05 High (Stable)
Flux value passing through the magnet pole. Essential parameter when building generators as well as sensors. The Pc coefficient determines the working geometry.

Table 11: Underwater work (magnet fishing)
MP 25x7x9 / N38

Environment Effective steel pull Effect
Air (land) 14.82 kg Standard
Water (riverbed) 16.97 kg
(+2.15 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

*Warning: On a vertical surface, the magnet retains merely a fraction of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically limits the holding force.

3. Temperature resistance

*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) = 1.05

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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.

Technical and environmental data

Elemental analysis

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: 030195-2026
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The ring-shaped magnet MP 25x7x9 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 14.82 kg works great as a door latch, speaker holder, or spacer element in devices.
This is a crucial issue when working with model MP 25x7x9 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.
Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. If you must use it outside, paint it with anti-corrosion paint after mounting.
The inner hole diameter determines the maximum size of the mounting element. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Always check that the screw head is not larger than the outer diameter of the magnet (25 mm), so it doesn't protrude beyond the outline.
It is a magnetic ring with a diameter of 25 mm and thickness 9 mm. The pulling force of this model is an impressive 14.82 kg, which translates to 145.39 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 7 mm.
The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages and disadvantages of neodymium magnets.

Benefits

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • Their strength remains stable, and after around 10 years it drops only by ~1% (according to research),
  • They feature excellent resistance to magnetism drop as a result of external magnetic sources,
  • In other words, due to the reflective surface of gold, the element is aesthetically pleasing,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures approaching 230°C and above...
  • Thanks to modularity in forming and the capacity to customize to specific needs,
  • Wide application in future technologies – they are utilized in data components, drive modules, medical equipment, also multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We suggest a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Furthermore, tiny parts of these products can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what affects it?

The specified lifting capacity concerns the peak performance, obtained under laboratory conditions, meaning:
  • using a sheet made of mild steel, acting as a magnetic yoke
  • with a cross-section minimum 10 mm
  • with a surface cleaned and smooth
  • under conditions of ideal adhesion (metal-to-metal)
  • under perpendicular force vector (90-degree angle)
  • at temperature room level

Practical lifting capacity: influencing factors

Real force is influenced by specific conditions, mainly (from priority):
  • Distance (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – 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.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Plate material – low-carbon steel attracts best. Alloy steels lower magnetic properties and holding force.
  • Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Immense force

Handle magnets consciously. Their powerful strength can surprise even professionals. Be vigilant and respect their power.

Demagnetization risk

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Magnetic media

Powerful magnetic fields can destroy records on payment cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Warning for allergy sufferers

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If an allergic reaction happens, immediately stop working with magnets and use protective gear.

Bone fractures

Pinching hazard: The attraction force is so great that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Medical interference

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Fire risk

Combustion risk: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Keep away from electronics

Remember: rare earth magnets produce a field that interferes with precision electronics. Maintain a separation from your phone, tablet, and GPS.

Product not for children

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

Eye protection

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Clashing of two magnets leads to them cracking into small pieces.

Warning! Details about risks in the article: Safety of working with magnets.