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MPL 40x20x6 / N38 - lamellar magnet

lamellar magnet

Catalog no 020589

GTIN/EAN: 5906301815822

Load capacity 13.76 kg / 134.94 N Magnetic Induction 239.54 mT / 2395 Gs
length
40 mm [±0,1 mm]
Width
20 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
36 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

What pull rating should I choose for a workshop block magnet?
A catalogue pull rating is measured under stated test conditions. A painted or thin steel surface, a gap or a load acting along the surface can reduce the practical grip. Choose a margin based on the actual installation and read the product card.
Are block neodymium magnets available in more durable versions?
Sintered NdFeB is brittle and can corrode if its coating is damaged. Check the coating and operating-temperature limit of the selected product. A housing may help protect a magnet in an application exposed to impacts.
How should I choose block magnets for mounting a structure?
First check the steel grade and thickness, then any gap created by paint or dirt, and finally the direction of the applied load. Compare these conditions with the specifications of the selected magnet; do not rely on grade alone.

Guides from the knowledge base

Engineering report for this magnet

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

PDF report Calculator
Want to talk magnets?

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

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Technical parameters of the product - MPL 40x20x6 / N38 - lamellar magnet

Specification / characteristics - MPL 40x20x6 / N38 - lamellar magnet

properties
properties values
Cat. no. 020589
GTIN/EAN 5906301815822
Distributor Dhit sp. z o.o.
Country of origin Poland / China / Germany
Customs code 85059029
length 40 mm [±0,1 mm]
Width 20 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 36 g
Magnetization Direction ↑ axial
Load capacity ~ ? 13.76 kg / 134.94 N
Magnetic Induction ~ ? 239.54 mT / 2395 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x20x6 / N38 - lamellar 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

Technical analysis of the magnet - data

These data represent the result of a engineering simulation. Results were calculated on algorithms for the material Nd2Fe14B. Operational performance may differ from theoretical values. Please consider these calculations as a reference point during assembly planning.

Table 1: Static force (pull vs gap) - power drop
MPL 40x20x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2395 Gs
239.5 mT
 13.76 kg / 30.34 LBS
13760.0 g / 135.0 N
 dangerous!
1 mm 2271 Gs
227.1 mT
 12.37 kg / 27.28 LBS
12374.3 g / 121.4 N
 dangerous!
2 mm 2127 Gs
212.7 mT
 10.85 kg / 23.93 LBS
10853.7 g / 106.5 N
 dangerous!
3 mm 1972 Gs
197.2 mT
 9.33 kg / 20.57 LBS
9331.3 g / 91.5 N
 strong
5 mm 1659 Gs
165.9 mT
 6.60 kg / 14.55 LBS
6601.4 g / 64.8 N
 strong
10 mm 1018 Gs
101.8 mT
 2.49 kg / 5.49 LBS
2488.3 g / 24.4 N
 strong
15 mm 627 Gs
62.7 mT
 0.94 kg / 2.08 LBS
942.0 g / 9.2 N
 low risk
20 mm 399 Gs
39.9 mT
 0.38 kg / 0.84 LBS
381.9 g / 3.7 N
 low risk
30 mm 181 Gs
18.1 mT
 0.08 kg / 0.17 LBS
79.0 g / 0.8 N
 low risk
50 mm 54 Gs
5.4 mT
 0.01 kg / 0.02 LBS
7.1 g / 0.1 N
 low risk
Magnetic force drops drastically per each millimeter of spacing. Remember that even a very thin break (e.g., dirt, paint, rust) strongly reduces the pull force. Magnets work strongest in perfect adhesion; gap drastically cuts the power. See how flashily the load capacity drop, when the product does not touch tightly to the steel surface. When calculating the arrangement, discard unnecessary gaps.

Table 2: Vertical capacity (vertical surface)
MPL 40x20x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Raw steel (µ ≈ 0.2) 2.75 kg / 6.07 LBS
2752.0 g / 27.0 N
1 mm Raw steel (µ ≈ 0.2) 2.47 kg / 5.45 LBS
2474.0 g / 24.3 N
2 mm Raw steel (µ ≈ 0.2) 2.17 kg / 4.78 LBS
2170.0 g / 21.3 N
3 mm Raw steel (µ ≈ 0.2) 1.87 kg / 4.11 LBS
1866.0 g / 18.3 N
5 mm Raw steel (µ ≈ 0.2) 1.32 kg / 2.91 LBS
1320.0 g / 12.9 N
10 mm Raw steel (µ ≈ 0.2) 0.50 kg / 1.10 LBS
498.0 g / 4.9 N
15 mm Raw steel (µ ≈ 0.2) 0.19 kg / 0.41 LBS
188.0 g / 1.8 N
20 mm Raw steel (µ ≈ 0.2) 0.08 kg / 0.17 LBS
76.0 g / 0.7 N
30 mm Raw steel (µ ≈ 0.2) 0.02 kg / 0.04 LBS
16.0 g / 0.2 N
50 mm Raw steel (µ ≈ 0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
The following data shows the theoretical holding capacity needed to cause the sliding of the magnet downwards along a vertical steel wall (considering typical friction). The holding force is relative to the distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x20x6 / N38

Surface type Friction coefficient / % Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% of nominal force
4.13 kg / 9.10 LBS
4128.0 g / 40.5 N
Painted steel (standard)
µ = 0.2 20% of nominal force
2.75 kg / 6.07 LBS
2752.0 g / 27.0 N
Oily/slippery steel
µ = 0.1 10% of nominal force
1.38 kg / 3.03 LBS
1376.0 g / 13.5 N
Magnet with anti-slip rubber
µ = 0.5 50% of nominal force
6.88 kg / 15.17 LBS
6880.0 g / 67.5 N
When mounting a magnet on a vertical wall (e.g., a fridge), it will only hold barely about 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient influence the fact that holders slide down faster than they pop off the substrate. Designing a wall mount? Consider that the sliding force is noticeably lower than the maximum static pull force. On a slippery surface, the holder will slip down under a much lighter weight. Using a rubber coating can drastically increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 40x20x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 0.69 kg / 1.52 LBS
688.0 g / 6.7 N
1 mm
13%
 1.72 kg / 3.79 LBS
1720.0 g / 16.9 N
2 mm
25%
 3.44 kg / 7.58 LBS
3440.0 g / 33.7 N
3 mm
38%
 5.16 kg / 11.38 LBS
5160.0 g / 50.6 N
5 mm
63%
 8.60 kg / 18.96 LBS
8600.0 g / 84.4 N
10 mm
100%
 13.76 kg / 30.34 LBS
13760.0 g / 135.0 N
11 mm
100%
 13.76 kg / 30.34 LBS
13760.0 g / 135.0 N
12 mm
100%
 13.76 kg / 30.34 LBS
13760.0 g / 135.0 N
A thin metal plate is unable to take in the entire magnetic field, which weakens actual performance of the magnet. If you mount a strong magnet to a too thin substrate, the flux will penetrate right through and the attraction force will be weaker. To achieve 100% of this magnet's power, you require a sufficiently solid piece of metal. The saturation effect causes that on sheet metal structures (e.g., thin profiles), the magnet works worse. We recommend selecting the steel thickness according to the table below.

Table 5: Thermal resistance (stability) - thermal limit
MPL 40x20x6 / N38

Magnet temperature (°C) Force change relative to 20°C Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 13.76 kg / 30.34 LBS
13760.0 g / 135.0 N
 Estimate
40 °C -4.4% 13.16 kg / 29.02 LBS
13161.2 g / 129.1 N
 Estimate
60 °C -8.6% 12.58 kg / 27.72 LBS
12575.8 g / 123.4 N
 Estimate
80 °C -12.8% 12.00 kg / 26.46 LBS
12003.6 g / 117.8 N
 Material limit
100 °C — — Out of range — no model
The table estimates the reversible force change relative to 20°C, assuming a Br coefficient of -0.11%/°C and force proportional to Br². This is a simplified model with unchanged contact and geometry, not a measurement. Above the material limit, neither force nor irreversible magnetization loss is predicted.
The temperature limit comes from this product’s material data. Permissible conditions also depend on geometry and the magnetic circuit. Without B-H curves for the specific grade and temperature, Pc alone does not determine irreversible demagnetization. Values within the material range do not guarantee the allowable temperature of the complete assembly.

Table 6: Two magnets (repulsion) - field range
MPL 40x20x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 28.29 kg / 62.37 LBS
3 904 Gs
4.24 kg / 9.36 LBS
4243 g / 41.6 N
 N/A
1 mm 26.93 kg / 59.36 LBS
4 673 Gs
4.04 kg / 8.90 LBS
4039 g / 39.6 N
 24.23 kg / 53.43 LBS
~0 Gs
2 mm 25.44 kg / 56.09 LBS
4 542 Gs
3.82 kg / 8.41 LBS
3816 g / 37.4 N
 22.90 kg / 50.48 LBS
~0 Gs
3 mm 23.89 kg / 52.67 LBS
4 402 Gs
3.58 kg / 7.90 LBS
3584 g / 35.2 N
 21.50 kg / 47.41 LBS
~0 Gs
5 mm 20.74 kg / 45.72 LBS
4 101 Gs
3.11 kg / 6.86 LBS
3110 g / 30.5 N
 18.66 kg / 41.14 LBS
~0 Gs
10 mm 13.57 kg / 29.92 LBS
3 318 Gs
2.04 kg / 4.49 LBS
2036 g / 20.0 N
 12.21 kg / 26.93 LBS
~0 Gs
20 mm 5.12 kg / 11.28 LBS
2 037 Gs
0.77 kg / 1.69 LBS
767 g / 7.5 N
 4.60 kg / 10.15 LBS
~0 Gs
50 mm 0.34 kg / 0.76 LBS
528 Gs
0.05 kg / 0.11 LBS
52 g / 0.5 N
 0.31 kg / 0.68 LBS
~0 Gs
60 mm 0.16 kg / 0.36 LBS
363 Gs
0.02 kg / 0.05 LBS
24 g / 0.2 N
 0.15 kg / 0.32 LBS
~0 Gs
70 mm 0.08 kg / 0.18 LBS
258 Gs
0.01 kg / 0.03 LBS
12 g / 0.1 N
 0.07 kg / 0.16 LBS
~0 Gs
80 mm 0.04 kg / 0.10 LBS
188 Gs
0.01 kg / 0.01 LBS
7 g / 0.1 N
 0.04 kg / 0.09 LBS
~0 Gs
90 mm 0.02 kg / 0.05 LBS
141 Gs
0.00 kg / 0.01 LBS
4 g / 0.0 N
 0.02 kg / 0.05 LBS
~0 Gs
100 mm 0.01 kg / 0.03 LBS
108 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
 0.01 kg / 0.03 LBS
~0 Gs
Two magnetic products interact from a significantly greater distance than a magnet and steel setup. Such a system of magnet-to-magnet creates a more powerful interaction and a further horizon of performance. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the pinch force is huge. The repulsion force is a bit weaker than the connection force, but still large.
*Field value for N-N configuration drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
Note: Results apply to shear force of two identical magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Axial field levels — not safety zones
MPL 40x20x6 / N38

Field level (Gs) mT Model distance (cm)
< 5 Gs < 0.5 mT 12.0 cm
< 10 Gs < 1.0 mT 9.5 cm
< 20 Gs < 2.0 mT 7.5 cm
< 40 Gs < 4.0 mT 6.0 cm
< 50 Gs < 5.0 mT 5.5 cm
< 400 Gs < 40.0 mT 2.0 cm
< 600 Gs < 60.0 mT 2.0 cm
Reference field levels for a model of one magnet, on its axis in air, with a 5 mm distance step. These are not device immunity limits or safe distances for implants. Do not use this table to assess the safety of a pacemaker, defibrillator or other implant; follow the device manufacturer’s and your clinician’s guidance. Steel and other magnets change the field distribution.

Table 8: Impact energy (kinetic energy) - collision effects
MPL 40x20x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.54 km/h
(6.26 m/s)
 0.71 J
30 mm 24.48 km/h
(6.80 m/s)
 0.83 J
50 mm 24.55 km/h
(6.82 m/s)
 0.84 J
100 mm 24.57 km/h
(6.82 m/s)
 0.84 J
Magnetic elements are very brittle – a collision with steel can result in shattering. Control the attraction moment – a magnet released freely turns into a projectile. Kinetic force can destroy the magnet or injury to fingers. Hold the magnet firmly during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear safety glasses when playing with powerful specimens.

Table 9: Anti-corrosion coating durability
MPL 40x20x6 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MPL 40x20x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 20 490 Mx 204.9 µWb
Pc Coefficient 0.27 Low (Flat)
Flux value passing through the magnet pole. Essential parameter in coil applications and motors. Pc value defines the working geometry.

Table 11: Physics of underwater searching
MPL 40x20x6 / N38

Environment Effective steel pull Effect
Air (land) 13.76 kg Standard
Water (riverbed) 15.76 kg
(+2.00 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!
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Wall mount (shear)

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

2. Plate thickness effect

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

3. Temperature resistance

N38: the maximum material working temperature is 80°C. Permitted conditions also depend on the shape and magnetic circuit.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.27

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

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: 020589-2026
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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 40x20x6 mm and a weight of 36 g, guarantees premium class connection. As a magnetic bar with high power (approx. 13.76 kg), this product is available off-the-shelf from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 13.76 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 40x20x6 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for workshop organization 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. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
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 (40x20 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 40x20x6 mm, which, at a weight of 36 g, makes it an element with high energy density. The key parameter here is the lifting capacity amounting to approximately 13.76 kg (force ~134.94 N), which, with such a compact shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of neodymium magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have stable power, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
  • They are extremely resistant to demagnetization induced by external field influence,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnetic induction on the working layer of the magnet remains very high,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in forming and the capacity to customize to complex applications,
  • Significant place in modern industrial fields – they find application in magnetic memories, brushless drives, medical devices, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in compact constructions

Disadvantages

Disadvantages of neodymium magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We recommend a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Detachment force of the magnet in optimal conditions – what it depends on?

The specified lifting capacity represents the limit force, measured under laboratory conditions, namely:
  • with the application of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • with a thickness no less than 10 mm
  • with a plane free of scratches
  • with direct contact (no coatings)
  • during detachment in a direction perpendicular to the mounting surface
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

Real force is affected by working environment parameters, mainly (from most important):
  • Distance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Load vector – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – too thin steel does not accept the full field, causing part of the flux to be escaped to the other side.
  • Material type – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
  • Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was assessed with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets
GPS and phone interference

Note: rare earth magnets generate a field that confuses precision electronics. Maintain a safe distance from your phone, tablet, and GPS.

Product not for children

Only for adults. Tiny parts pose a choking risk, leading to severe trauma. Store away from kids and pets.

Sensitization to coating

A percentage of the population have a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Extended handling might lead to a rash. We recommend wear safety gloves.

Machining danger

Dust produced during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Demagnetization risk

Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.

Magnets are brittle

Watch out for shards. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.

Handling guide

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Hand protection

Big blocks can crush fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Health Danger

For implant holders: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Keep away from computers

Powerful magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

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