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MPL 40x18x10 SH / N38 - lamellar magnet

lamellar magnet

Catalog no 020157

GTIN/EAN: 5906301811633

5.00

length

40 mm [±0,1 mm]

Width

18 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

54 g

Magnetization Direction

↑ axial

Load capacity

23.81 kg / 233.58 N

Magnetic Induction

366.66 mT / 3667 Gs

Coating

[NiCuNi] Nickel

technical specifications »

36.29 ZŁ with VAT / pcs + price for transport

29.50 ZŁ net + 23% VAT / pcs

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Technical - MPL 40x18x10 SH / N38 - lamellar magnet

Specification / characteristics - MPL 40x18x10 SH / N38 - lamellar magnet

properties
properties values
Cat. no. 020157
GTIN/EAN 5906301811633
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 18 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 54 g
Magnetization Direction ↑ axial
Load capacity ~ ? 23.81 kg / 233.58 N
Magnetic Induction ~ ? 366.66 mT / 3667 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x18x10 SH / 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 modeling of the magnet - technical parameters

These data represent the direct effect of a physical simulation. Values were calculated on models for the class Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Please consider these data as a reference point for designers.

Table 1: Static pull force (force vs gap) - interaction chart
MPL 40x18x10 SH / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3666 Gs
366.6 mT
 23.81 kg / 52.49 LBS
23810.0 g / 233.6 N
 dangerous!
1 mm 3399 Gs
339.9 mT
 20.48 kg / 45.14 LBS
20476.1 g / 200.9 N
 dangerous!
2 mm 3120 Gs
312.0 mT
 17.25 kg / 38.02 LBS
17245.9 g / 169.2 N
 dangerous!
3 mm 2841 Gs
284.1 mT
 14.30 kg / 31.54 LBS
14304.1 g / 140.3 N
 dangerous!
5 mm 2321 Gs
232.1 mT
 9.55 kg / 21.05 LBS
9547.8 g / 93.7 N
 warning
10 mm 1370 Gs
137.0 mT
 3.32 kg / 7.33 LBS
3324.4 g / 32.6 N
 warning
15 mm 833 Gs
83.3 mT
 1.23 kg / 2.71 LBS
1229.0 g / 12.1 N
 low risk
20 mm 530 Gs
53.0 mT
 0.50 kg / 1.10 LBS
498.1 g / 4.9 N
 low risk
30 mm 244 Gs
24.4 mT
 0.11 kg / 0.23 LBS
105.3 g / 1.0 N
 low risk
50 mm 75 Gs
7.5 mT
 0.01 kg / 0.02 LBS
9.9 g / 0.1 N
 low risk
Grip strength drops sharply with every subsequent millimeter of spacing. Keep in mind that even a microscopic distance (e.g., dirt, varnish, rust) strongly diminishes the holding power. Magnetic products work optimally at the point of direct contact; gap drastically cuts the force. Notice how flashily the parameters plummet, when the magnet does not touch flatly to the steel surface. When planning the arrangement, avoid unnecessary gaps.

Table 2: Shear capacity (vertical surface)
MPL 40x18x10 SH / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.76 kg / 10.50 LBS
4762.0 g / 46.7 N
1 mm Stal (~0.2) 4.10 kg / 9.03 LBS
4096.0 g / 40.2 N
2 mm Stal (~0.2) 3.45 kg / 7.61 LBS
3450.0 g / 33.8 N
3 mm Stal (~0.2) 2.86 kg / 6.31 LBS
2860.0 g / 28.1 N
5 mm Stal (~0.2) 1.91 kg / 4.21 LBS
1910.0 g / 18.7 N
10 mm Stal (~0.2) 0.66 kg / 1.46 LBS
664.0 g / 6.5 N
15 mm Stal (~0.2) 0.25 kg / 0.54 LBS
246.0 g / 2.4 N
20 mm Stal (~0.2) 0.10 kg / 0.22 LBS
100.0 g / 1.0 N
30 mm Stal (~0.2) 0.02 kg / 0.05 LBS
22.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
The following data presents the estimated weight limit required to initiate the shifting of the magnet vertically against a upright steel wall (assuming typical friction). The holding force varies with the distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 40x18x10 SH / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
7.14 kg / 15.75 LBS
7143.0 g / 70.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.76 kg / 10.50 LBS
4762.0 g / 46.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.38 kg / 5.25 LBS
2381.0 g / 23.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
11.91 kg / 26.25 LBS
11905.0 g / 116.8 N
When hanging a holder on a upright wall (e.g., a car body), it you can count on barely about 1/5 of nominal attraction strength. Gravity as well as a low friction coefficient cause that products slide down faster than they detach. Designing a vertical fastening? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the element will give way down under a noticeably lighter load. Using a rubber coating can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MPL 40x18x10 SH / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.19 kg / 2.62 LBS
1190.5 g / 11.7 N
1 mm
13%
 2.98 kg / 6.56 LBS
2976.3 g / 29.2 N
2 mm
25%
 5.95 kg / 13.12 LBS
5952.5 g / 58.4 N
3 mm
38%
 8.93 kg / 19.68 LBS
8928.7 g / 87.6 N
5 mm
63%
 14.88 kg / 32.81 LBS
14881.3 g / 146.0 N
10 mm
100%
 23.81 kg / 52.49 LBS
23810.0 g / 233.6 N
11 mm
100%
 23.81 kg / 52.49 LBS
23810.0 g / 233.6 N
12 mm
100%
 23.81 kg / 52.49 LBS
23810.0 g / 233.6 N
A too thin steel is incapable of conduct the full magnetic flux, which weakens actual performance of the magnet. If you attach a powerful product to a weak sheet, the flux will pass right through and the pull force will drop sharply. To utilize 100% of this neodymium's potential, you need a suitably thick piece of steel. The material oversaturation means that on sheet metal structures (e.g., car bodies), the holder holds weaker. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal stability (material behavior) - power drop
MPL 40x18x10 SH / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 23.81 kg / 52.49 LBS
23810.0 g / 233.6 N
 OK
40 °C -2.2% 23.29 kg / 51.34 LBS
23286.2 g / 228.4 N
 OK
60 °C -4.4% 22.76 kg / 50.18 LBS
22762.4 g / 223.3 N
80 °C -6.6% 22.24 kg / 49.03 LBS
22238.5 g / 218.2 N
100 °C -28.8% 16.95 kg / 37.37 LBS
16952.7 g / 166.3 N
Ordinary NdFeB products change their properties strength past the thermal threshold. Protect against heat – excessive heat can irreversibly demagnetize this product. With increasing heat, the neodymium's force temporarily decreases. Avoid using this magnet close to heaters higher than its working range. Too high temperature will lead to destruction of magnetism.
*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low Pc) may lose charge permanently under lower heat stress than taller cylinders. Red status in the table signals permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MPL 40x18x10 SH / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 59.64 kg / 131.49 LBS
5 034 Gs
8.95 kg / 19.72 LBS
8947 g / 87.8 N
 N/A
1 mm 55.50 kg / 122.35 LBS
7 072 Gs
8.32 kg / 18.35 LBS
8325 g / 81.7 N
 49.95 kg / 110.12 LBS
~0 Gs
2 mm 51.29 kg / 113.08 LBS
6 799 Gs
7.69 kg / 16.96 LBS
7694 g / 75.5 N
 46.16 kg / 101.77 LBS
~0 Gs
3 mm 47.18 kg / 104.01 LBS
6 520 Gs
7.08 kg / 15.60 LBS
7076 g / 69.4 N
 42.46 kg / 93.61 LBS
~0 Gs
5 mm 39.41 kg / 86.88 LBS
5 959 Gs
5.91 kg / 13.03 LBS
5912 g / 58.0 N
 35.47 kg / 78.20 LBS
~0 Gs
10 mm 23.92 kg / 52.73 LBS
4 643 Gs
3.59 kg / 7.91 LBS
3588 g / 35.2 N
 21.53 kg / 47.46 LBS
~0 Gs
20 mm 8.33 kg / 18.36 LBS
2 739 Gs
1.25 kg / 2.75 LBS
1249 g / 12.3 N
 7.49 kg / 16.52 LBS
~0 Gs
50 mm 0.55 kg / 1.22 LBS
705 Gs
0.08 kg / 0.18 LBS
83 g / 0.8 N
 0.50 kg / 1.09 LBS
~0 Gs
60 mm 0.26 kg / 0.58 LBS
487 Gs
0.04 kg / 0.09 LBS
40 g / 0.4 N
 0.24 kg / 0.52 LBS
~0 Gs
70 mm 0.13 kg / 0.30 LBS
348 Gs
0.02 kg / 0.04 LBS
20 g / 0.2 N
 0.12 kg / 0.27 LBS
~0 Gs
80 mm 0.07 kg / 0.16 LBS
256 Gs
0.01 kg / 0.02 LBS
11 g / 0.1 N
 0.07 kg / 0.14 LBS
~0 Gs
90 mm 0.04 kg / 0.09 LBS
194 Gs
0.01 kg / 0.01 LBS
6 g / 0.1 N
 0.04 kg / 0.08 LBS
~0 Gs
100 mm 0.02 kg / 0.05 LBS
149 Gs
0.00 kg / 0.01 LBS
4 g / 0.0 N
 0.02 kg / 0.05 LBS
~0 Gs
Two strong neodymiums attract each other from a much further distance than a neodymium and metal combination. The setup of two magnets creates a more powerful interaction and a wider radius of action. Planning to create a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Remember that when connecting a pair of magnets, the impact force is extreme. The levitation is marginally weaker than the connection force, but still significant.
*Flux density between like poles drops to ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Note: Estimates refer to shear force of a pair of identical neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - warnings
MPL 40x18x10 SH / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 14.0 cm
Hearing aid 10 Gs (1.0 mT) 11.0 cm
Timepiece 20 Gs (2.0 mT) 8.5 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 poses a serious hazard to electronic devices and medical implants. These NdFeB products generate a field that disrupts operation of sensitive medical devices. Be aware: the unseen radiation acts through matter and housings. Exceptional care must be taken by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - collision effects
MPL 40x18x10 SH / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.95 km/h
(6.38 m/s)
 1.10 J
30 mm 36.78 km/h
(10.22 m/s)
 2.82 J
50 mm 47.37 km/h
(13.16 m/s)
 4.67 J
100 mm 66.97 km/h
(18.60 m/s)
 9.34 J
Neodymium magnets are very brittle – a violent impact against metal risks their cracking. Watch the impact speed – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or injury to fingers. Always hold the magnet during mounting so it doesn't slam with momentum against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear eye protection when working with powerful specimens.

Table 9: Corrosion resistance
MPL 40x18x10 SH / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MPL 40x18x10 SH / N38

Parameter Value SI Unit / Description
Magnetic Flux 26 060 Mx 260.6 µWb
Pc Coefficient 0.43 Low (Flat)
Total magnetic flux passing through the magnet pole. Key data when building generators and motors. Pc value defines the working geometry.

Table 11: Physics of underwater searching
MPL 40x18x10 SH / N38

Environment Effective steel pull Effect
Air (land) 23.81 kg Standard
Water (riverbed) 27.26 kg
(+3.45 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.
1. Shear force

*Note: On a vertical wall, the magnet retains merely approx. 20-30% of its nominal pull.

2. Steel saturation

*Thin steel (e.g. computer case) severely limits the holding force.

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.43

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 specification and ecology
Material specification
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: 020157-2026
Measurement Calculator
Pulling force
Magnetic Field
Input a number in one of the inputs, and the rest will convert automatically.

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 40x18x10 mm and a weight of 54 g, guarantees premium class connection. This magnetic block with a force of 233.58 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 40x18x10 SH / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 40x18x10 SH / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 23.81 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.
For mounting flat magnets MPL 40x18x10 SH / N38, we recommend utilizing strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. In practice, this means that this magnet has the greatest attraction force on its main planes (40x18 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.
This model is characterized by dimensions 40x18x10 mm, which, at a weight of 54 g, makes it an element with high energy density. The key parameter here is the lifting capacity amounting to approximately 23.81 kg (force ~233.58 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:
  • They retain attractive force for nearly 10 years – the drop is just ~1% (according to analyses),
  • Neodymium magnets are characterized by remarkably resistant to demagnetization caused by external field sources,
  • By covering with a shiny coating of silver, the element acquires an nice look,
  • They feature high magnetic induction at the operating surface, which increases their power,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
  • Thanks to versatility in forming and the ability to adapt to complex applications,
  • Versatile presence in electronics industry – they find application in data components, brushless drives, medical devices, also multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in force. 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 water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing nuts and complicated shapes in magnets, we recommend using cover - magnetic mechanism.
  • Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Information about lifting capacity was determined for optimal configuration, assuming:
  • using a plate made of low-carbon steel, serving as a magnetic yoke
  • whose transverse dimension is min. 10 mm
  • with a plane cleaned and smooth
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction perpendicular to the plane
  • at ambient temperature room level

Determinants of practical lifting force of a magnet

Effective lifting capacity impacted by specific conditions, mainly (from priority):
  • Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, whereas under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a small distance between the magnet and the plate decreases the holding force.

Safe handling of neodymium magnets
GPS and phone interference

Note: neodymium magnets produce a field that confuses precision electronics. Keep a separation from your phone, tablet, and GPS.

Keep away from computers

Data protection: Strong magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Caution required

Exercise caution. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can move away.

Flammability

Dust generated during grinding of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Allergic reactions

Certain individuals have a sensitization to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact can result in dermatitis. It is best to use protective gloves.

Danger to pacemakers

For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or request help to work with the magnets.

Magnet fragility

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Heat warning

Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

No play value

Product intended for adults. Tiny parts can be swallowed, leading to intestinal necrosis. Store away from kids and pets.

Pinching danger

Watch your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Important! Learn more about hazards in the article: Safety of working with magnets.