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MPL 40x10x18 / N38 - lamellar magnet

lamellar magnet

Catalog no 020149

GTIN/EAN: 5906301811558

length

40 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

18 mm [±0,1 mm]

Weight

54 g

Magnetization Direction

→ diametrical

Load capacity

16.72 kg / 164.01 N

Magnetic Induction

540.48 mT / 5405 Gs

Coating

[NiCuNi] Nickel

check parameters »

18.45 ZŁ with VAT / pcs + price for transport

15.00 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 40x10x18 / N38 - lamellar magnet

Specification / characteristics - MPL 40x10x18 / N38 - lamellar magnet

properties
properties values
Cat. no. 020149
GTIN/EAN 5906301811558
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
length 40 mm [±0,1 mm]
Width 10 mm [±0,1 mm]
Height 18 mm [±0,1 mm]
Weight 54 g
Magnetization Direction → diametrical
Load capacity ~ ? 16.72 kg / 164.01 N
Magnetic Induction ~ ? 540.48 mT / 5405 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x10x18 / N38 - lamellar 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

Technical simulation of the magnet - technical parameters

These values represent the result of a engineering calculation. Values are based on models for the material Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Use these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs distance) - characteristics
MPL 40x10x18 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5402 Gs
540.2 mT
 16.72 kg / 36.86 pounds
16720.0 g / 164.0 N
 crushing
1 mm 4664 Gs
466.4 mT
 12.46 kg / 27.48 pounds
12464.6 g / 122.3 N
 crushing
2 mm 3970 Gs
397.0 mT
 9.03 kg / 19.90 pounds
9028.7 g / 88.6 N
 medium risk
3 mm 3362 Gs
336.2 mT
 6.48 kg / 14.28 pounds
6476.4 g / 63.5 N
 medium risk
5 mm 2432 Gs
243.2 mT
 3.39 kg / 7.47 pounds
3388.5 g / 33.2 N
 medium risk
10 mm 1220 Gs
122.0 mT
 0.85 kg / 1.88 pounds
853.2 g / 8.4 N
 low risk
15 mm 703 Gs
70.3 mT
 0.28 kg / 0.62 pounds
282.9 g / 2.8 N
 low risk
20 mm 440 Gs
44.0 mT
 0.11 kg / 0.24 pounds
111.1 g / 1.1 N
 low risk
30 mm 203 Gs
20.3 mT
 0.02 kg / 0.05 pounds
23.6 g / 0.2 N
 low risk
50 mm 64 Gs
6.4 mT
 0.00 kg / 0.01 pounds
2.4 g / 0.0 N
 low risk
Magnetic force weakens drastically with every mm of gap. Remember that every additional insulation layer (e.g., dirt, varnish, veneer) significantly reduces the pull force. Neodymiums work most effectively at the point of direct contact; air break drastically cuts the power. Notice how quickly the load capacity fall, when the magnet does not adhere directly to the metal substrate. When planning the mounting, discard redundant distances.

Table 2: Vertical capacity (wall)
MPL 40x10x18 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.34 kg / 7.37 pounds
3344.0 g / 32.8 N
1 mm Stal (~0.2) 2.49 kg / 5.49 pounds
2492.0 g / 24.4 N
2 mm Stal (~0.2) 1.81 kg / 3.98 pounds
1806.0 g / 17.7 N
3 mm Stal (~0.2) 1.30 kg / 2.86 pounds
1296.0 g / 12.7 N
5 mm Stal (~0.2) 0.68 kg / 1.49 pounds
678.0 g / 6.7 N
10 mm Stal (~0.2) 0.17 kg / 0.37 pounds
170.0 g / 1.7 N
15 mm Stal (~0.2) 0.06 kg / 0.12 pounds
56.0 g / 0.5 N
20 mm Stal (~0.2) 0.02 kg / 0.05 pounds
22.0 g / 0.2 N
30 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
The following data defines the estimated weight limit needed to initiate the shifting of the magnet downwards along a vertical metal surface (considering standard friction). This parameter is a function of the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 40x10x18 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.02 kg / 11.06 pounds
5016.0 g / 49.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.34 kg / 7.37 pounds
3344.0 g / 32.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.67 kg / 3.69 pounds
1672.0 g / 16.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
8.36 kg / 18.43 pounds
8360.0 g / 82.0 N
When hanging a holder on a vertical plane (e.g., a fridge), it you can count on only about 20%-30% of its nominal power. Gravity as well as a low friction coefficient influence the fact that magnets slip easier than they pop off the substrate. Planning a wall mount? Remember that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the magnet will give way down under a noticeably lighter load. Application of an anti-slip pad can effectively increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 40x10x18 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 0.84 kg / 1.84 pounds
836.0 g / 8.2 N
1 mm
13%
 2.09 kg / 4.61 pounds
2090.0 g / 20.5 N
2 mm
25%
 4.18 kg / 9.22 pounds
4180.0 g / 41.0 N
3 mm
38%
 6.27 kg / 13.82 pounds
6270.0 g / 61.5 N
5 mm
63%
 10.45 kg / 23.04 pounds
10450.0 g / 102.5 N
10 mm
100%
 16.72 kg / 36.86 pounds
16720.0 g / 164.0 N
11 mm
100%
 16.72 kg / 36.86 pounds
16720.0 g / 164.0 N
12 mm
100%
 16.72 kg / 36.86 pounds
16720.0 g / 164.0 N
A thin metal plate is not enough to absorb the full magnetic flux, which weakens actual performance of the holder. If you install a neodymium to a too thin substrate, the flux will penetrate right through and the holding will be smaller. To achieve the maximum of this neodymium's potential, you need a suitably thick piece of steel. The material oversaturation causes that on delicate walls (e.g., car bodies), the product holds weaker. We advise picking the steel dimension according to the table below.

Table 5: Thermal resistance (stability) - power drop
MPL 40x10x18 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 16.72 kg / 36.86 pounds
16720.0 g / 164.0 N
 OK
40 °C -2.2% 16.35 kg / 36.05 pounds
16352.2 g / 160.4 N
 OK
60 °C -4.4% 15.98 kg / 35.24 pounds
15984.3 g / 156.8 N
 OK
80 °C -6.6% 15.62 kg / 34.43 pounds
15616.5 g / 153.2 N
100 °C -28.8% 11.90 kg / 26.25 pounds
11904.6 g / 116.8 N
Classic neodymiums irreversibly lose strength past the thermal threshold. Protect against heat – excessive heat can permanently damage this magnet. With increasing heat, the magnet's power temporarily lowers. Refrain from using this magnet near heat sources exceeding its operating temperature limit. Exceeding the critical threshold will cause irreversible degradation of magnetism.
*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (low Pc) risk losing magnetic properties sooner than taller cylinders. The danger warning in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MPL 40x10x18 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 71.96 kg / 158.65 pounds
5 928 Gs
10.79 kg / 23.80 pounds
10794 g / 105.9 N
 N/A
1 mm 62.49 kg / 137.76 pounds
10 068 Gs
9.37 kg / 20.66 pounds
9373 g / 91.9 N
 56.24 kg / 123.98 pounds
~0 Gs
2 mm 53.65 kg / 118.27 pounds
9 328 Gs
8.05 kg / 17.74 pounds
8047 g / 78.9 N
 48.28 kg / 106.44 pounds
~0 Gs
3 mm 45.76 kg / 100.88 pounds
8 615 Gs
6.86 kg / 15.13 pounds
6864 g / 67.3 N
 41.18 kg / 90.79 pounds
~0 Gs
5 mm 32.92 kg / 72.58 pounds
7 308 Gs
4.94 kg / 10.89 pounds
4938 g / 48.4 N
 29.63 kg / 65.32 pounds
~0 Gs
10 mm 14.58 kg / 32.15 pounds
4 864 Gs
2.19 kg / 4.82 pounds
2188 g / 21.5 N
 13.13 kg / 28.94 pounds
~0 Gs
20 mm 3.67 kg / 8.10 pounds
2 441 Gs
0.55 kg / 1.21 pounds
551 g / 5.4 N
 3.30 kg / 7.29 pounds
~0 Gs
50 mm 0.21 kg / 0.46 pounds
585 Gs
0.03 kg / 0.07 pounds
32 g / 0.3 N
 0.19 kg / 0.42 pounds
~0 Gs
60 mm 0.10 kg / 0.22 pounds
406 Gs
0.02 kg / 0.03 pounds
15 g / 0.1 N
 0.09 kg / 0.20 pounds
~0 Gs
70 mm 0.05 kg / 0.12 pounds
293 Gs
0.01 kg / 0.02 pounds
8 g / 0.1 N
 0.05 kg / 0.10 pounds
~0 Gs
80 mm 0.03 kg / 0.06 pounds
217 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
 0.03 kg / 0.06 pounds
~0 Gs
90 mm 0.02 kg / 0.04 pounds
165 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
 0.02 kg / 0.03 pounds
~0 Gs
100 mm 0.01 kg / 0.02 pounds
128 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
 0.01 kg / 0.02 pounds
~0 Gs
Two strong neodymiums interact from a significantly greater distance than a magnet and steel setup. The connection of two magnets creates a more powerful interaction and a further horizon of performance. Want to build a strong closure? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the collision energy is massive. The repulsion force is a bit weaker than the connection force, but still impressive.
*The magnetic induction for N-N configuration is approximately ~0 Gs at the midpoint between the magnets (due to field cancellation).
Note: Results demonstrate shear force of a pair of matching magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 40x10x18 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 13.5 cm
Hearing aid 10 Gs (1.0 mT) 10.5 cm
Timepiece 20 Gs (2.0 mT) 8.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 6.5 cm
Car key 50 Gs (5.0 mT) 6.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm
A strong magnetic field is a serious hazard to IT equipment as well as pacemakers. These magnets produce a field that disrupts operation of digital equipment. Remember: the unseen radiation acts through matter and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MPL 40x10x18 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.30 km/h
(5.08 m/s)
 0.70 J
30 mm 30.76 km/h
(8.55 m/s)
 1.97 J
50 mm 39.69 km/h
(11.02 m/s)
 3.28 J
100 mm 56.12 km/h
(15.59 m/s)
 6.56 J
NdFeB products are prone to chipping – a violent impact against metal risks their cracking. Watch the impact speed – a magnet released freely becomes dangerous. Impact energy can destroy the magnet or injury to skin. Be sure to control the product during bringing near metal so it doesn't hit with great force against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when working with large magnets.

Table 9: Coating parameters (durability)
MPL 40x10x18 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MPL 40x10x18 / N38

Parameter Value SI Unit / Description
Magnetic Flux 21 285 Mx 212.9 µWb
Pc Coefficient 0.79 High (Stable)
Flux value passing through the magnet pole. Key data in coil applications and motors. The Pc coefficient defines the working geometry.

Table 11: Submerged application
MPL 40x10x18 / N38

Environment Effective steel pull Effect
Air (land) 16.72 kg Standard
Water (riverbed) 19.14 kg
(+2.42 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Vertical hold

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

2. Efficiency vs thickness

*Thin steel (e.g. computer case) significantly weakens the holding force.

3. Heat tolerance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.79

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.

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%
Sustainability
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: 020149-2026
Magnet Unit Converter
Force (pull)
Magnetic Field
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This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 40x10x18 mm and a weight of 54 g, guarantees the highest quality connection. This magnetic block with a force of 164.01 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 40x10x18 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 40x10x18 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 16.72 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 40x10x18 / N38 model is magnetized through the thickness (dimension 18 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (40x10 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 40 mm (length), 10 mm (width), and 18 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 16.72 kg (force ~164.01 N), which, with such a compact shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of rare earth magnets.

Advantages

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • They do not lose their magnetic properties even under strong external field,
  • A magnet with a metallic nickel surface looks better,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to flexibility in designing and the ability to customize to client solutions,
  • Significant place in modern industrial fields – they find application in hard drives, drive modules, diagnostic systems, as well as modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Due to limitations in producing threads and complex shapes in magnets, we propose using casing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these magnets can be problematic in diagnostics medical after entering the body.
  • Due to neodymium price, their price exceeds standard values,

Pull force analysis

Maximum holding power of the magnet – what it depends on?

Information about lifting capacity was determined for optimal configuration, taking into account:
  • using a base made of mild steel, serving as a magnetic yoke
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • under conditions of gap-free contact (metal-to-metal)
  • for force applied at a right angle (in the magnet axis)
  • in neutral thermal conditions

Determinants of lifting force in real conditions

Bear in mind that the magnet holding will differ subject to the following factors, starting with the most relevant:
  • Gap between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material type – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Warnings
Hand protection

Large magnets can crush fingers instantly. Under no circumstances put your hand betwixt two strong magnets.

Do not overheat magnets

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Choking Hazard

Absolutely store magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are life-threatening.

Pacemakers

Individuals with a heart stimulator must maintain an absolute distance from magnets. The magnetic field can stop the operation of the implant.

Compass and GPS

Navigation devices and mobile phones are extremely susceptible to magnetism. Close proximity with a strong magnet can ruin the internal compass in your phone.

Metal Allergy

Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction happens, immediately stop working with magnets and wear gloves.

Fire risk

Machining of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Threat to electronics

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

Caution required

Use magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and do not underestimate their force.

Protective goggles

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Caution! Need more info? Read our article: Why are neodymium magnets dangerous?