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MP 21.9x10x5 / N52 - ring magnet

ring magnet

Catalog no 030598

GTIN/EAN: 5906301816089

Load capacity 7.97 kg / 78.16 N Magnetic Induction 300.00 mT / 3000 Gs
Diameter
21.9 mm [±0,1 mm]
internal diameter Ø
10 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
11.18 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

check technical specifications »

1.400 zł net / pcs

1.722 zł with VAT (23% VAT) / pcs

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Frequently asked questions

Where can I compare prices of ring magnets for mounting in Poland?
The DHIT price list and individual product cards show the available ring magnets and their current prices. Compare the outside diameter, hole diameter, height, grade and quantity before ordering.
Are ring magnets resistant to damage?
NdFeB is brittle and may crack on impact or when magnets collide. A coating or suitable housing can provide additional protection, but a screw must not place excessive stress on the magnet. Check the mounting instructions for the selected model.
Which ring magnet is suitable for an outdoor structure?
Check the coating, protection against moisture and the temperature reached at the actual installation site. An unprotected magnet should not be assumed suitable for continuous water exposure. Compare the conditions with the selected product card.
Where can I check the available sizes of neodymium ring magnets?
The category and price list show the dimensions of available models. Each product card gives the outside diameter, inside diameter and height. If a suitable size is missing, ask about a custom version.

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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Detailed specification - MP 21.9x10x5 / N52 - ring magnet

Specification / characteristics - MP 21.9x10x5 / N52 - ring magnet

properties
properties values
Cat. no. 030598
GTIN/EAN 5906301816089
Distributor Dhit sp. z o.o.
Country of origin Poland / China / Germany
Customs code 85059029
Diameter 21.9 mm [±0,1 mm]
internal diameter Ø 10 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 11.18 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.97 kg / 78.16 N
Magnetic Induction ~ ? 300.00 mT / 3000 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N52

Specification / characteristics MP 21.9x10x5 / N52 - ring magnet
properties values units
Remanence Br ? 14.2-14.7 kGs
Remanence Br ? 1420-1470 mT
Coercivity bHc ? 10.8-12.5 kOe
Coercivity bHc ? 860-995 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 48-53 BH max MGOe
Energy product BHmax ? 380-422 BH max KJ/m
Maximum working temperature ? ≤ 60 °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 modeling of the product - data

Presented information represent the direct effect of a physical simulation. Values are based on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - interaction chart
MP 21.9x10x5 / N52

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2999 Gs
299.9 mT
 7.97 kg / 17.57 lbs
7970.0 g / 78.2 N
 warning
1 mm 2815 Gs
281.5 mT
 7.02 kg / 15.47 lbs
7019.1 g / 68.9 N
 warning
2 mm 2593 Gs
259.3 mT
 5.96 kg / 13.14 lbs
5958.2 g / 58.4 N
 warning
3 mm 2353 Gs
235.3 mT
 4.91 kg / 10.81 lbs
4905.4 g / 48.1 N
 warning
5 mm 1871 Gs
187.1 mT
 3.10 kg / 6.84 lbs
3101.8 g / 30.4 N
 warning
10 mm 963 Gs
96.3 mT
 0.82 kg / 1.81 lbs
822.2 g / 8.1 N
 weak grip
15 mm 502 Gs
50.2 mT
 0.22 kg / 0.49 lbs
223.1 g / 2.2 N
 weak grip
20 mm 281 Gs
28.1 mT
 0.07 kg / 0.15 lbs
69.8 g / 0.7 N
 weak grip
30 mm 108 Gs
10.8 mT
 0.01 kg / 0.02 lbs
10.4 g / 0.1 N
 weak grip
50 mm 28 Gs
2.8 mT
 0.00 kg / 0.00 lbs
0.7 g / 0.0 N
 weak grip
Grip strength weakens drastically with every mm of distance. Note that even a microscopic distance (e.g., dirt, varnish, dust) noticeably weakens the grip. Neodymiums work most effectively at the point of direct contact; air break drastically cuts the power. Notice how quickly the load capacity drop, when the product does not adhere directly to the metal substrate. When planning the mounting, discard redundant distances.

Table 2: Vertical capacity (vertical surface)
MP 21.9x10x5 / N52

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Raw steel (µ ≈ 0.2) 1.59 kg / 3.51 lbs
1594.0 g / 15.6 N
1 mm Raw steel (µ ≈ 0.2) 1.40 kg / 3.10 lbs
1404.0 g / 13.8 N
2 mm Raw steel (µ ≈ 0.2) 1.19 kg / 2.63 lbs
1192.0 g / 11.7 N
3 mm Raw steel (µ ≈ 0.2) 0.98 kg / 2.16 lbs
982.0 g / 9.6 N
5 mm Raw steel (µ ≈ 0.2) 0.62 kg / 1.37 lbs
620.0 g / 6.1 N
10 mm Raw steel (µ ≈ 0.2) 0.16 kg / 0.36 lbs
164.0 g / 1.6 N
15 mm Raw steel (µ ≈ 0.2) 0.04 kg / 0.10 lbs
44.0 g / 0.4 N
20 mm Raw steel (µ ≈ 0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 N
30 mm Raw steel (µ ≈ 0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
50 mm Raw steel (µ ≈ 0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
The table below indicates the estimated weight limit needed to start the sliding of the magnet downwards on a upright metal surface (assuming standard friction coefficient). This parameter is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 21.9x10x5 / N52

Surface type Friction coefficient / % Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% of nominal force
2.39 kg / 5.27 lbs
2391.0 g / 23.5 N
Painted steel (standard)
µ = 0.2 20% of nominal force
1.59 kg / 3.51 lbs
1594.0 g / 15.6 N
Oily/slippery steel
µ = 0.1 10% of nominal force
0.80 kg / 1.76 lbs
797.0 g / 7.8 N
Magnet with anti-slip rubber
µ = 0.5 50% of nominal force
3.99 kg / 8.79 lbs
3985.0 g / 39.1 N
When mounting a element on a upright plane (e.g., a car body), it will maintain only approx. 1/5 of its nominal power. Gravitational force and a weak degree of grip mean that holders move down easier than they detach. Want to create a vertical fastening? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the magnet will slip down under a noticeably lighter load. Utilizing a rubberized layer can drastically raise the stability.

Table 4: Steel thickness (saturation) - power losses
MP 21.9x10x5 / N52

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.80 kg / 1.76 lbs
797.0 g / 7.8 N
1 mm
25%
 1.99 kg / 4.39 lbs
1992.5 g / 19.5 N
2 mm
50%
 3.99 kg / 8.79 lbs
3985.0 g / 39.1 N
3 mm
75%
 5.98 kg / 13.18 lbs
5977.5 g / 58.6 N
5 mm
100%
 7.97 kg / 17.57 lbs
7970.0 g / 78.2 N
10 mm
100%
 7.97 kg / 17.57 lbs
7970.0 g / 78.2 N
11 mm
100%
 7.97 kg / 17.57 lbs
7970.0 g / 78.2 N
12 mm
100%
 7.97 kg / 17.57 lbs
7970.0 g / 78.2 N
A too thin steel is not enough to conduct the full magnetic flux, which weakens actual performance of the magnet. Should you attach a powerful product to a thin surface, the magnetism will penetrate right through and the holding will be smaller. To utilize 100% of this magnet's power, you require a sufficiently solid piece of metal. The saturation effect means that on thin elements (e.g., thin profiles), the magnet works worse. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal resistance (stability) - resistance threshold
MP 21.9x10x5 / N52

Magnet temperature (°C) Force change relative to 20°C Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.97 kg / 17.57 lbs
7970.0 g / 78.2 N
 Estimate
40 °C -4.4% 7.62 kg / 16.81 lbs
7623.2 g / 74.8 N
 Estimate
60 °C -8.6% 7.28 kg / 16.06 lbs
7284.1 g / 71.5 N
 Material limit
80 °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: Magnet-Magnet interaction (repulsion) - field range
MP 21.9x10x5 / N52

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 16.54 kg / 36.46 lbs
4 868 Gs
2.48 kg / 5.47 lbs
2480 g / 24.3 N
 N/A
1 mm 15.60 kg / 34.39 lbs
5 827 Gs
2.34 kg / 5.16 lbs
2340 g / 23.0 N
 14.04 kg / 30.95 lbs
~0 Gs
2 mm 14.56 kg / 32.11 lbs
5 630 Gs
2.18 kg / 4.82 lbs
2184 g / 21.4 N
 13.11 kg / 28.90 lbs
~0 Gs
3 mm 13.47 kg / 29.70 lbs
5 415 Gs
2.02 kg / 4.46 lbs
2021 g / 19.8 N
 12.13 kg / 26.73 lbs
~0 Gs
5 mm 11.26 kg / 24.81 lbs
4 949 Gs
1.69 kg / 3.72 lbs
1688 g / 16.6 N
 10.13 kg / 22.33 lbs
~0 Gs
10 mm 6.44 kg / 14.19 lbs
3 742 Gs
0.97 kg / 2.13 lbs
965 g / 9.5 N
 5.79 kg / 12.77 lbs
~0 Gs
20 mm 1.71 kg / 3.76 lbs
1 927 Gs
0.26 kg / 0.56 lbs
256 g / 2.5 N
 1.54 kg / 3.38 lbs
~0 Gs
50 mm 0.05 kg / 0.12 lbs
338 Gs
0.01 kg / 0.02 lbs
8 g / 0.1 N
 0.05 kg / 0.10 lbs
~0 Gs
60 mm 0.02 kg / 0.05 lbs
217 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
 0.02 kg / 0.04 lbs
~0 Gs
70 mm 0.01 kg / 0.02 lbs
146 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.01 lbs
103 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.01 lbs
75 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
56 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnetic products interact from a much further distance than a neodymium and metal setup. The setup of two magnets creates a more powerful interaction and a further horizon of action. Designing a strong closure? Use a pair of magnets instead of one magnet and a steel. Remember that when attracting two neodymiums, the impact force is massive. The repulsion force is slightly lower than the connection force, but still impressive.
*Flux density between like poles is approximately ~0 Gs in the exact middle between the magnets (due to field cancellation).
Important: Estimates refer to shear force of two same magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Axial field levels — not safety zones
MP 21.9x10x5 / N52

Field level (Gs) mT Model distance (cm)
< 5 Gs < 0.5 mT 9.5 cm
< 10 Gs < 1.0 mT 7.5 cm
< 20 Gs < 2.0 mT 6.0 cm
< 40 Gs < 4.0 mT 4.5 cm
< 50 Gs < 5.0 mT 4.5 cm
< 400 Gs < 40.0 mT 2.0 cm
< 600 Gs < 60.0 mT 1.5 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 (cracking risk) - collision effects
MP 21.9x10x5 / N52

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 28.62 km/h
(7.95 m/s)
 0.35 J
30 mm 29.88 km/h
(8.30 m/s)
 0.39 J
50 mm 29.90 km/h
(8.31 m/s)
 0.39 J
100 mm 29.91 km/h
(8.31 m/s)
 0.39 J
NdFeB products are very brittle – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Use safety goggles when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MP 21.9x10x5 / N52

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: Construction data (Pc)
MP 21.9x10x5 / N52

Parameter Value SI Unit / Description
Magnetic Flux 10 872 Mx 108.7 µWb
Pc Coefficient 0.35 Low (Flat)
Flux value passing through the magnet pole. Key data in coil applications and motors. Pc value determines the working geometry.

Table 11: Physics of underwater searching
MP 21.9x10x5 / N52

Environment Effective steel pull Effect
Air (land) 7.97 kg Standard
Water (riverbed) 9.13 kg
(+1.16 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Shear force

*Note: On a vertical surface, the magnet holds just approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.

3. Thermal stability

N52: the maximum material working temperature is 60°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) = 0.35

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. At low Pc values (typical for flat magnets, below about 1) 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

Chemical composition

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: 030598-2026
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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. It is also often used in advertising for fixing signs and in workshops for organizing tools.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. 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.
Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for indoor use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.
A screw or bolt with a thread diameter smaller than 10 mm fits this model. 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.
This model is characterized by dimensions Ø21.9x5 mm and a weight of 11.18 g. The key parameter here is the holding force amounting to approximately 7.97 kg (force ~78.16 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 10 mm.
The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Advantages and disadvantages of neodymium magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They retain magnetic properties for almost 10 years – the loss is just ~1% (in theory),
  • Magnets effectively protect themselves against demagnetization caused by ambient magnetic noise,
  • In other words, due to the aesthetic finish of gold, the element looks attractive,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to freedom in forming and the capacity to customize to complex applications,
  • Significant place in electronics industry – they find application in computer drives, electromotive mechanisms, medical equipment, and industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • Do not exceed this material temperature limit: 60°C. Overheating may permanently weaken the magnet.
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating nuts and complex forms in magnets, we recommend using cover - magnetic holder.
  • Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what it depends on?

Holding force of 7.97 kg is a theoretical maximum value performed under standard conditions:
  • using a sheet made of low-carbon steel, serving as a magnetic yoke
  • with a thickness minimum 10 mm
  • with a plane perfectly flat
  • without any air gap between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at room temperature

Lifting capacity in practice – influencing factors

During everyday use, the real power depends on a number of factors, listed from most significant:
  • Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Material type – the best choice is pure iron steel. Hardened steels may attract less.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, in contrast under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets
Medical implants

Life threat: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Precision electronics

Navigation devices and smartphones are highly sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Keep away from children

Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep away from children and animals.

Heat sensitivity

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.

Threat to electronics

Avoid bringing magnets near a purse, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Avoid contact if allergic

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid direct skin contact or select coated magnets.

Fire risk

Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Finger safety

Big blocks can break fingers instantly. Do not place your hand between two strong magnets.

Powerful field

Handle magnets with awareness. Their powerful strength can shock even experienced users. Stay alert and respect their power.

Eye protection

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

Caution! Want to know more? Read our article: Are neodymium magnets dangerous?