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MW 10x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010008

GTIN/EAN: 5906301810070

5.00

Diameter Ø

10 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

1.77 g

Magnetization Direction

↑ axial

Load capacity

2.15 kg / 21.04 N

Magnetic Induction

318.70 mT / 3187 Gs

Coating

[NiCuNi] Nickel

check technical data »

0.726 ZŁ with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

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Detailed specification - MW 10x3 / N38 - cylindrical magnet

Specification / characteristics - MW 10x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010008
GTIN/EAN 5906301810070
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 10 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 1.77 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.15 kg / 21.04 N
Magnetic Induction ~ ? 318.70 mT / 3187 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x3 / N38 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Physical simulation of the assembly - technical parameters

Presented information represent the outcome of a mathematical analysis. Results are based on algorithms for the class Nd2Fe14B. Real-world performance may differ. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
MW 10x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3185 Gs
318.5 mT
 2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
 strong
1 mm 2657 Gs
265.7 mT
 1.50 kg / 3.30 lbs
1496.2 g / 14.7 N
 safe
2 mm 2081 Gs
208.1 mT
 0.92 kg / 2.02 lbs
918.1 g / 9.0 N
 safe
3 mm 1573 Gs
157.3 mT
 0.52 kg / 1.16 lbs
524.4 g / 5.1 N
 safe
5 mm 874 Gs
87.4 mT
 0.16 kg / 0.36 lbs
161.7 g / 1.6 N
 safe
10 mm 241 Gs
24.1 mT
 0.01 kg / 0.03 lbs
12.3 g / 0.1 N
 safe
15 mm 92 Gs
9.2 mT
 0.00 kg / 0.00 lbs
1.8 g / 0.0 N
 safe
20 mm 44 Gs
4.4 mT
 0.00 kg / 0.00 lbs
0.4 g / 0.0 N
 safe
30 mm 14 Gs
1.4 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
50 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
Magnetic force decreases drastically per each millimeter of gap. Keep in mind that even a very thin break (e.g., contamination, paint, dust) strongly weakens the grip. Magnetic products hold strongest in perfect adhesion; distance weakens the power. Notice how rapidly the load capacity fall, when the product does not touch flatly to the steel surface. When calculating the assembly, eliminate unnecessary gaps.

Table 2: Sliding load (wall)
MW 10x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.43 kg / 0.95 lbs
430.0 g / 4.2 N
1 mm Stal (~0.2) 0.30 kg / 0.66 lbs
300.0 g / 2.9 N
2 mm Stal (~0.2) 0.18 kg / 0.41 lbs
184.0 g / 1.8 N
3 mm Stal (~0.2) 0.10 kg / 0.23 lbs
104.0 g / 1.0 N
5 mm Stal (~0.2) 0.03 kg / 0.07 lbs
32.0 g / 0.3 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
The table below defines the estimated shear load sufficient to initiate the shifting of the magnet vertically against a upright metal surface (considering standard friction coefficient). This parameter is relative to the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 10x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.64 kg / 1.42 lbs
645.0 g / 6.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.43 kg / 0.95 lbs
430.0 g / 4.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.22 kg / 0.47 lbs
215.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.08 kg / 2.37 lbs
1075.0 g / 10.5 N
When placing a element on a vertical plane (e.g., a board), it will maintain just approx. 20%-30% of its nominal power. Gravitational force and a weak degree of grip influence the fact that products slide down faster than they pop off the substrate. Planning a vertical fastening? Note that the sliding force is significantly lower than the maximum static pull force. On a smooth steel, the element will slide down under a noticeably lighter weight. Using a rubber layer can drastically increase the grip.

Table 4: Steel thickness (saturation) - power losses
MW 10x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.22 kg / 0.47 lbs
215.0 g / 2.1 N
1 mm
25%
 0.54 kg / 1.18 lbs
537.5 g / 5.3 N
2 mm
50%
 1.08 kg / 2.37 lbs
1075.0 g / 10.5 N
3 mm
75%
 1.61 kg / 3.55 lbs
1612.5 g / 15.8 N
5 mm
100%
 2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
10 mm
100%
 2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
11 mm
100%
 2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
12 mm
100%
 2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
A thin metal plate is incapable of focus the entire magnetic field, which wastes potential of the holder. Should you mount a strong magnet to a weak sheet, the magnetism will pass right through and the attraction force will be weaker. To utilize full efficiency of this magnet's potential, you require a sufficiently solid element of metal. The material oversaturation causes that on thin elements (e.g., thin profiles), the magnet works worse. We suggest choosing the steel thickness based on the following data.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 10x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.15 kg / 4.74 lbs
2150.0 g / 21.1 N
 OK
40 °C -2.2% 2.10 kg / 4.64 lbs
2102.7 g / 20.6 N
 OK
60 °C -4.4% 2.06 kg / 4.53 lbs
2055.4 g / 20.2 N
80 °C -6.6% 2.01 kg / 4.43 lbs
2008.1 g / 19.7 N
100 °C -28.8% 1.53 kg / 3.37 lbs
1530.8 g / 15.0 N
Ordinary NdFeB products lose power past the thermal threshold. Protect against heat – high temperature can irreversibly destroy this magnet. With every degree above norm, the magnet's capacity briefly drops. Avoid using this magnet near heat sources exceeding its safe range. Ignoring the limit will result in permanent loss of magnetic properties.
*Technical advisory: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) are more susceptible to demagnetization at lower temperatures than taller cylinders. Warning indicator in the table points to a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 10x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.91 kg / 10.83 lbs
4 754 Gs
0.74 kg / 1.62 lbs
737 g / 7.2 N
 N/A
1 mm 4.18 kg / 9.22 lbs
5 877 Gs
0.63 kg / 1.38 lbs
627 g / 6.2 N
 3.76 kg / 8.30 lbs
~0 Gs
2 mm 3.42 kg / 7.54 lbs
5 314 Gs
0.51 kg / 1.13 lbs
513 g / 5.0 N
 3.08 kg / 6.78 lbs
~0 Gs
3 mm 2.71 kg / 5.98 lbs
4 732 Gs
0.41 kg / 0.90 lbs
407 g / 4.0 N
 2.44 kg / 5.38 lbs
~0 Gs
5 mm 1.59 kg / 3.52 lbs
3 630 Gs
0.24 kg / 0.53 lbs
239 g / 2.3 N
 1.44 kg / 3.16 lbs
~0 Gs
10 mm 0.37 kg / 0.81 lbs
1 747 Gs
0.06 kg / 0.12 lbs
55 g / 0.5 N
 0.33 kg / 0.73 lbs
~0 Gs
20 mm 0.03 kg / 0.06 lbs
483 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
 0.03 kg / 0.06 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
48 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
29 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
19 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
13 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
9 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
7 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two strong neodymiums attract each other from a much further distance than a neodymium and metal setup. The connection of two magnets generates a stronger field and a further horizon of operation. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a steel. Remember that when connecting a pair of magnets, the impact force is massive. The levitation is a bit weaker than the attraction, but still impressive.
*The magnetic induction between like poles drops to ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Note: Results show shear force of two identical magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - precautionary measures
MW 10x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
A strong magnetic field poses a real danger to electronics as well as medical implants. These NdFeB products generate a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, remotes, membranes, and screens. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MW 10x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 35.27 km/h
(9.80 m/s)
 0.08 J
30 mm 60.88 km/h
(16.91 m/s)
 0.25 J
50 mm 78.60 km/h
(21.83 m/s)
 0.42 J
100 mm 111.15 km/h
(30.88 m/s)
 0.84 J
Neodymium magnets are prone to chipping – a strong collision with metal risks their cracking. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Kinetic force can trigger coating fragments or injury to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear eye protection when playing with large magnets.

Table 9: Anti-corrosion coating durability
MW 10x3 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MW 10x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 694 Mx 26.9 µWb
Pc Coefficient 0.40 Low (Flat)
Flux value emitted by the magnet pole. Essential parameter in coil applications and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 10x3 / N38

Environment Effective steel pull Effect
Air (land) 2.15 kg Standard
Water (riverbed) 2.46 kg
(+0.31 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Vertical hold

*Note: On a vertical surface, the magnet retains only approx. 20-30% of its max power.

2. Steel thickness impact

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

3. Temperature resistance

*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) = 0.40

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
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%
Environmental data
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010008-2026
Quick Unit Converter
Force (pull)
Field Strength
Put a figure in just one field to receive results in the other units immediately.

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The offered product is an incredibly powerful rod magnet, produced from durable NdFeB material, which, with dimensions of Ø10x3 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 2.15 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 21.04 N with a weight of only 1.77 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 10.1 mm) using epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø10x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø10x3 mm, which, at a weight of 1.77 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 2.15 kg (force ~21.04 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 10 mm. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros and cons of neodymium magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even during approximately ten years – the drop in lifting capacity is only ~1% (theoretically),
  • They have excellent resistance to weakening of magnetic properties as a result of opposing magnetic fields,
  • A magnet with a shiny silver surface has better aesthetics,
  • Magnets exhibit maximum magnetic induction on the working surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to freedom in forming and the capacity to modify to individual projects,
  • Huge importance in modern technologies – they are commonly used in data components, electric motors, medical devices, and other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as 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
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • We suggest casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these products are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

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

Breakaway force is the result of a measurement for the most favorable conditions, taking into account:
  • on a block made of structural steel, effectively closing the magnetic field
  • whose thickness is min. 10 mm
  • characterized by smoothness
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction perpendicular to the plane
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

It is worth knowing that the application force will differ subject to elements below, in order of importance:
  • Distance (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Steel grade – ideal substrate is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Safety rules for work with NdFeB magnets
Immense force

Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Do not overheat magnets

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Bone fractures

Large magnets can break fingers in a fraction of a second. Do not place your hand betwixt two attracting surfaces.

Allergy Warning

Studies show that the nickel plating (the usual finish) is a potent allergen. For allergy sufferers, prevent touching magnets with bare hands and choose coated magnets.

Impact on smartphones

Navigation devices and mobile phones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Pacemakers

People with a ICD have to keep an safe separation from magnets. The magnetism can stop the functioning of the life-saving device.

Risk of cracking

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Danger to the youngest

Adult use only. Tiny parts can be swallowed, leading to severe trauma. Store out of reach of kids and pets.

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Electronic devices

Powerful magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Safety First! Looking for details? Check our post: Are neodymium magnets dangerous?