← previous
next →
Product available Ships in 2 days

MP 25x8x5 / N38 - ring magnet

ring magnet

Catalog no 030196

GTIN/EAN: 5906301812135

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

16.52 g

Magnetization Direction

↑ axial

Load capacity

7.16 kg / 70.21 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

check technical specifications »

5.90 ZŁ with VAT / pcs + price for transport

4.80 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
4.80 ZŁ
5.90 ZŁ
price from 150 pcs
4.51 ZŁ
5.55 ZŁ
price from 550 pcs
4.22 ZŁ
5.20 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure where to buy?

Contact us by phone +48 888 99 98 98 if you prefer send us a note using inquiry form our website.
Lifting power along with shape of a neodymium magnet can be checked with our modular calculator.

Same-day shipping for orders placed before 14:00.

Product card - MP 25x8x5 / N38 - ring magnet

Specification / characteristics - MP 25x8x5 / N38 - ring magnet

properties
properties values
Cat. no. 030196
GTIN/EAN 5906301812135
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter 25 mm [±0,1 mm]
internal diameter Ø 8 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 16.52 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.16 kg / 70.21 N
Magnetic Induction ~ ? 230.20 mT / 2302 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x5 / N38 - ring 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

Engineering simulation of the magnet - report

The following data constitute the outcome of a physical simulation. Values were calculated on algorithms for the material Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Use these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs distance) - power drop
MP 25x8x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5777 Gs
577.7 mT
 7.16 kg / 15.79 pounds
7160.0 g / 70.2 N
 strong
1 mm 5310 Gs
531.0 mT
 6.05 kg / 13.33 pounds
6048.6 g / 59.3 N
 strong
2 mm 4846 Gs
484.6 mT
 5.04 kg / 11.10 pounds
5036.9 g / 49.4 N
 strong
3 mm 4397 Gs
439.7 mT
 4.15 kg / 9.15 pounds
4148.2 g / 40.7 N
 strong
5 mm 3576 Gs
357.6 mT
 2.74 kg / 6.05 pounds
2743.2 g / 26.9 N
 strong
10 mm 2073 Gs
207.3 mT
 0.92 kg / 2.03 pounds
921.6 g / 9.0 N
 weak grip
15 mm 1231 Gs
123.1 mT
 0.33 kg / 0.72 pounds
325.2 g / 3.2 N
 weak grip
20 mm 773 Gs
77.3 mT
 0.13 kg / 0.28 pounds
128.0 g / 1.3 N
 weak grip
30 mm 356 Gs
35.6 mT
 0.03 kg / 0.06 pounds
27.2 g / 0.3 N
 weak grip
50 mm 115 Gs
11.5 mT
 0.00 kg / 0.01 pounds
2.8 g / 0.0 N
 weak grip
Magnetic force decreases sharply with every mm of distance. Keep in mind that even a very thin break (e.g., dirt, paint, veneer) significantly reduces the pull force. Magnetic products hold most effectively in perfect adhesion; gap kills the power. Observe how flashily the parameters fall, when the product does not adhere flatly to the metal substrate. When calculating the mounting, eliminate redundant distances.

Table 2: Vertical load (vertical surface)
MP 25x8x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.43 kg / 3.16 pounds
1432.0 g / 14.0 N
1 mm Stal (~0.2) 1.21 kg / 2.67 pounds
1210.0 g / 11.9 N
2 mm Stal (~0.2) 1.01 kg / 2.22 pounds
1008.0 g / 9.9 N
3 mm Stal (~0.2) 0.83 kg / 1.83 pounds
830.0 g / 8.1 N
5 mm Stal (~0.2) 0.55 kg / 1.21 pounds
548.0 g / 5.4 N
10 mm Stal (~0.2) 0.18 kg / 0.41 pounds
184.0 g / 1.8 N
15 mm Stal (~0.2) 0.07 kg / 0.15 pounds
66.0 g / 0.6 N
20 mm Stal (~0.2) 0.03 kg / 0.06 pounds
26.0 g / 0.3 N
30 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
The following data shows the approximate force sufficient to cause the sliding of the magnet vertically against a vertical steel wall (assuming standard friction coefficient). This parameter is relative to the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 25x8x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.15 kg / 4.74 pounds
2148.0 g / 21.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.43 kg / 3.16 pounds
1432.0 g / 14.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.72 kg / 1.58 pounds
716.0 g / 7.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.58 kg / 7.89 pounds
3580.0 g / 35.1 N
When placing a holder on a upright surface (e.g., a fridge), it will only hold barely about 20%-30% of its maximum pull force. Gravity and a low friction coefficient influence the fact that products move down easier than they pop off the substrate. Planning a wall mount? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a significantly smaller weight. Application of an anti-slip pad can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 25x8x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.72 kg / 1.58 pounds
716.0 g / 7.0 N
1 mm
25%
 1.79 kg / 3.95 pounds
1790.0 g / 17.6 N
2 mm
50%
 3.58 kg / 7.89 pounds
3580.0 g / 35.1 N
3 mm
75%
 5.37 kg / 11.84 pounds
5370.0 g / 52.7 N
5 mm
100%
 7.16 kg / 15.79 pounds
7160.0 g / 70.2 N
10 mm
100%
 7.16 kg / 15.79 pounds
7160.0 g / 70.2 N
11 mm
100%
 7.16 kg / 15.79 pounds
7160.0 g / 70.2 N
12 mm
100%
 7.16 kg / 15.79 pounds
7160.0 g / 70.2 N
A thin metal plate cannot conduct the entire magnetic field, which weakens actual performance of the holder. Should you attach a powerful product to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To achieve the maximum of this neodymium's power, you require a sufficiently solid backing of metal. The saturation phenomenon causes that on sheet metal structures (e.g., appliance housings), the product shows lower pull force. We recommend selecting the steel cross-section based on the following data.

Table 5: Working in heat (material behavior) - power drop
MP 25x8x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.16 kg / 15.79 pounds
7160.0 g / 70.2 N
 OK
40 °C -2.2% 7.00 kg / 15.44 pounds
7002.5 g / 68.7 N
 OK
60 °C -4.4% 6.84 kg / 15.09 pounds
6845.0 g / 67.1 N
 OK
80 °C -6.6% 6.69 kg / 14.74 pounds
6687.4 g / 65.6 N
100 °C -28.8% 5.10 kg / 11.24 pounds
5097.9 g / 50.0 N
Classic neodymiums lose strength above the temperature limit. Watch out for overheating – excessive heat can permanently destroy this product. With every degree above norm, the neodymium's capacity momentarily lowers. Avoid using this magnet in hot environments higher than its working range. Exceeding the critical threshold will cause permanent loss of magnetic properties.
*Technical advisory: Temperature resistance is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) may lose charge permanently under lower heat stress than taller cylinders. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 25x8x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 82.42 kg / 181.72 pounds
6 082 Gs
12.36 kg / 27.26 pounds
12364 g / 121.3 N
 N/A
1 mm 75.95 kg / 167.44 pounds
11 091 Gs
11.39 kg / 25.12 pounds
11392 g / 111.8 N
 68.35 kg / 150.69 pounds
~0 Gs
2 mm 69.63 kg / 153.51 pounds
10 620 Gs
10.44 kg / 23.03 pounds
10445 g / 102.5 N
 62.67 kg / 138.16 pounds
~0 Gs
3 mm 63.64 kg / 140.29 pounds
10 153 Gs
9.55 kg / 21.04 pounds
9545 g / 93.6 N
 57.27 kg / 126.26 pounds
~0 Gs
5 mm 52.69 kg / 116.16 pounds
9 238 Gs
7.90 kg / 17.42 pounds
7903 g / 77.5 N
 47.42 kg / 104.54 pounds
~0 Gs
10 mm 31.58 kg / 69.62 pounds
7 152 Gs
4.74 kg / 10.44 pounds
4737 g / 46.5 N
 28.42 kg / 62.66 pounds
~0 Gs
20 mm 10.61 kg / 23.39 pounds
4 145 Gs
1.59 kg / 3.51 pounds
1591 g / 15.6 N
 9.55 kg / 21.05 pounds
~0 Gs
50 mm 0.65 kg / 1.43 pounds
1 024 Gs
0.10 kg / 0.21 pounds
97 g / 1.0 N
 0.58 kg / 1.28 pounds
~0 Gs
60 mm 0.31 kg / 0.69 pounds
712 Gs
0.05 kg / 0.10 pounds
47 g / 0.5 N
 0.28 kg / 0.62 pounds
~0 Gs
70 mm 0.16 kg / 0.36 pounds
514 Gs
0.02 kg / 0.05 pounds
24 g / 0.2 N
 0.15 kg / 0.32 pounds
~0 Gs
80 mm 0.09 kg / 0.20 pounds
383 Gs
0.01 kg / 0.03 pounds
14 g / 0.1 N
 0.08 kg / 0.18 pounds
~0 Gs
90 mm 0.05 kg / 0.12 pounds
293 Gs
0.01 kg / 0.02 pounds
8 g / 0.1 N
 0.05 kg / 0.11 pounds
~0 Gs
100 mm 0.03 kg / 0.07 pounds
230 Gs
0.00 kg / 0.01 pounds
5 g / 0.0 N
 0.03 kg / 0.06 pounds
~0 Gs
Two magnets attract each other from a much further distance than a neodymium and metal combination. The connection of two magnets produces a massive flux and a wider radius of performance. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the pinch force is extreme. The repulsion force is marginally weaker than the connection force, but still significant.
*The magnetic induction between like poles is approximately ~0 Gs in the exact middle between the magnets (due to field cancellation).
Important: Estimates show friction force of a pair of matching neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - precautionary measures
MP 25x8x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 17.0 cm
Hearing aid 10 Gs (1.0 mT) 13.5 cm
Timepiece 20 Gs (2.0 mT) 10.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 8.0 cm
Remote 50 Gs (5.0 mT) 7.5 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm
Extremely neodym field poses a serious hazard to electronic devices and pacemakers. These neodymiums produce a flux that disrupts operation of sensitive medical devices. Notice: the unseen radiation penetrates the body and housings. Exceptional care must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MP 25x8x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.62 km/h
(6.28 m/s)
 0.33 J
30 mm 36.45 km/h
(10.13 m/s)
 0.85 J
50 mm 46.96 km/h
(13.04 m/s)
 1.41 J
100 mm 66.40 km/h
(18.44 m/s)
 2.81 J
Neodymium magnets are prone to chipping – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely turns into a projectile. Kinetic force can destroy the magnet or injury to fingers. Always hold the magnet during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when handling with large magnets.

Table 9: Anti-corrosion coating durability
MP 25x8x5 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (Pc)
MP 25x8x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 24 536 Mx 245.4 µWb
Pc Coefficient 1.03 High (Stable)
Total magnetic flux emitted by the pole surface. Essential parameter for generator designers as well as sensors. Pc value determines the magnet's operating point.

Table 11: Physics of underwater searching
MP 25x8x5 / N38

Environment Effective steel pull Effect
Air (land) 7.16 kg Standard
Water (riverbed) 8.20 kg
(+1.04 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Vertical hold

*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its nominal pull.

2. Steel thickness impact

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

3. Temperature resistance

*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) = 1.03

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.

Engineering data and GPSR
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: 030196-2026
Magnet Unit Converter
Magnet pull force
Field Strength
Put a figure in a single slot to get results for all other units at once.

Other products

UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
Product available Ships in 2 days

UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread

12.23 ZŁ brutto / pcs
UMC 16x5/2x5 / N38 - cylindrical magnetic holder
Product available Ships in 2 days

UMC 16x5/2x5 / N38 - cylindrical magnetic holder

3.33 ZŁ brutto / pcs
MW 8x5 / N38 - cylindrical magnet
Product available Ships in 2 days

MW 8x5 / N38 - cylindrical magnet

0.836 ZŁ brutto / pcs
MW 3x1 / N38 - cylindrical magnet
Product available Ships in 2 days

MW 3x1 / N38 - cylindrical magnet

0.1353 ZŁ brutto / pcs
The ring-shaped magnet MP 25x8x5 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.
This is a crucial issue when working with model MP 25x8x5 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a flexible washer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.
These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.
The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.
It is a magnetic ring with a diameter of 25 mm and thickness 5 mm. The pulling force of this model is an impressive 7.16 kg, which translates to 70.21 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 8 mm.
The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Pros and cons of Nd2Fe14B magnets.

Strengths

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • They virtually do not lose power, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • Neodymium magnets prove to be extremely resistant to magnetic field loss caused by external field sources,
  • By using a smooth coating of nickel, the element gains an proper look,
  • Magnets possess very high magnetic induction on the surface,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of accurate creating as well as optimizing to precise applications,
  • Huge importance in high-tech industry – they are utilized in computer drives, brushless drives, medical devices, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in miniature devices

Weaknesses

Problematic aspects of neodymium magnets and proposals for their use:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We suggest a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complicated forms.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these magnets can complicate diagnosis medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

The lifting capacity listed is a theoretical maximum value conducted under the following configuration:
  • using a sheet made of mild steel, acting as a ideal flux conductor
  • with a thickness minimum 10 mm
  • with an ground touching surface
  • under conditions of ideal adhesion (surface-to-surface)
  • under axial force direction (90-degree angle)
  • at standard ambient temperature

Determinants of lifting force in real conditions

During everyday use, the real power results from several key aspects, ranked from most significant:
  • Gap (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Load vector – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin steel does not close the flux, causing part of the flux to be wasted to the other side.
  • Steel grade – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
  • Plate texture – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

H&S for magnets
Product not for children

Adult use only. Tiny parts can be swallowed, leading to serious injuries. Keep out of reach of kids and pets.

Fire risk

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

Threat to navigation

Be aware: rare earth magnets generate a field that confuses sensitive sensors. Keep a safe distance from your phone, device, and GPS.

Handling rules

Exercise caution. Rare earth magnets act from a long distance and snap with massive power, often quicker than you can move away.

Protect data

Do not bring magnets close to a purse, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.

Metal Allergy

A percentage of the population suffer from a contact allergy to nickel, which is the common plating for NdFeB magnets. Frequent touching can result in skin redness. We suggest use safety gloves.

Beware of splinters

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets will cause them breaking into shards.

Operating temperature

Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. Damage is permanent.

Pacemakers

For implant holders: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Bone fractures

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Attention! Details about hazards in the article: Safety of working with magnets.