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MW 12.5x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010014

GTIN/EAN: 5906301810131

5.00

Diameter Ø

12.5 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

1.84 g

Magnetization Direction

↑ axial

Load capacity

1.42 kg / 13.89 N

Magnetic Induction

188.88 mT / 1889 Gs

Coating

[NiCuNi] Nickel

technical parameters »

0.935 ZŁ with VAT / pcs + price for transport

0.760 ZŁ net + 23% VAT / pcs

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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.

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Physical properties - MW 12.5x2 / N38 - cylindrical magnet

Specification / characteristics - MW 12.5x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010014
GTIN/EAN 5906301810131
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 12.5 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 1.84 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.42 kg / 13.89 N
Magnetic Induction ~ ? 188.88 mT / 1889 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12.5x2 / 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 modeling of the magnet - report

Presented values constitute the direct effect of a mathematical calculation. Results rely on algorithms for the class Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs distance) - interaction chart
MW 12.5x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1888 Gs
188.8 mT
 1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
 low risk
1 mm 1703 Gs
170.3 mT
 1.16 kg / 2.55 LBS
1155.6 g / 11.3 N
 low risk
2 mm 1453 Gs
145.3 mT
 0.84 kg / 1.85 LBS
840.3 g / 8.2 N
 low risk
3 mm 1190 Gs
119.0 mT
 0.56 kg / 1.24 LBS
564.1 g / 5.5 N
 low risk
5 mm 752 Gs
75.2 mT
 0.23 kg / 0.50 LBS
225.0 g / 2.2 N
 low risk
10 mm 241 Gs
24.1 mT
 0.02 kg / 0.05 LBS
23.2 g / 0.2 N
 low risk
15 mm 96 Gs
9.6 mT
 0.00 kg / 0.01 LBS
3.7 g / 0.0 N
 low risk
20 mm 46 Gs
4.6 mT
 0.00 kg / 0.00 LBS
0.9 g / 0.0 N
 low risk
30 mm 15 Gs
1.5 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 low risk
50 mm 4 Gs
0.4 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
Magnetic force weakens sharply with every subsequent millimeter of distance. Note that every additional insulation layer (e.g., contamination, varnish, rust) strongly reduces the pull force. Neodymiums operate strongest during direct contact; gap nullifies the force. Observe how flashily the load capacity drop, when the product does not adhere directly to the steel surface. When designing the mounting, avoid additional spacers.

Table 2: Slippage force (vertical surface)
MW 12.5x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.28 kg / 0.63 LBS
284.0 g / 2.8 N
1 mm Stal (~0.2) 0.23 kg / 0.51 LBS
232.0 g / 2.3 N
2 mm Stal (~0.2) 0.17 kg / 0.37 LBS
168.0 g / 1.6 N
3 mm Stal (~0.2) 0.11 kg / 0.25 LBS
112.0 g / 1.1 N
5 mm Stal (~0.2) 0.05 kg / 0.10 LBS
46.0 g / 0.5 N
10 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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 following data calculates the estimated holding capacity needed to cause the sliding of the magnet downwards on a upright steel plate (considering standard friction). The holding force is a function of the distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 12.5x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.43 kg / 0.94 LBS
426.0 g / 4.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.28 kg / 0.63 LBS
284.0 g / 2.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.14 kg / 0.31 LBS
142.0 g / 1.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.71 kg / 1.57 LBS
710.0 g / 7.0 N
When placing a magnet on a upright plane (e.g., a fridge), it you can count on only about 20%-30% of its nominal power. Gravity as well as a weak degree of grip influence the fact that holders move down faster than they detach. Planning a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the magnet will give way down under a noticeably lighter weight. Utilizing a rubberized coating can significantly increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12.5x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.14 kg / 0.31 LBS
142.0 g / 1.4 N
1 mm
25%
 0.36 kg / 0.78 LBS
355.0 g / 3.5 N
2 mm
50%
 0.71 kg / 1.57 LBS
710.0 g / 7.0 N
3 mm
75%
 1.07 kg / 2.35 LBS
1065.0 g / 10.4 N
5 mm
100%
 1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
10 mm
100%
 1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
11 mm
100%
 1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
12 mm
100%
 1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
A thin metal plate is not enough to focus the full magnetic flux, which squanders power of the holder. Should you mount a strong magnet to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To achieve full efficiency of this neodymium's potential, you require a sufficiently solid piece of metal. The saturation phenomenon means that on delicate walls (e.g., car bodies), the holder shows lower pull force. We suggest choosing the steel dimension from these parameters.

Table 5: Working in heat (stability) - resistance threshold
MW 12.5x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
 OK
40 °C -2.2% 1.39 kg / 3.06 LBS
1388.8 g / 13.6 N
 OK
60 °C -4.4% 1.36 kg / 2.99 LBS
1357.5 g / 13.3 N
80 °C -6.6% 1.33 kg / 2.92 LBS
1326.3 g / 13.0 N
100 °C -28.8% 1.01 kg / 2.23 LBS
1011.0 g / 9.9 N
Ordinary NdFeB products lose power after exceeding the maximum temperature. Avoid high temperatures – heat can irreversibly destroy this product. With increasing heat, the neodymium's capacity momentarily lowers. Avoid using this magnet close to ovens higher than its operating temperature limit. Ignoring the limit will cause destruction of magnetism.
*Technical advisory: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) risk losing magnetic properties sooner than long magnets. Red status in the table signals a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MW 12.5x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.70 kg / 5.95 LBS
3 338 Gs
0.40 kg / 0.89 LBS
405 g / 4.0 N
 N/A
1 mm 2.47 kg / 5.45 LBS
3 616 Gs
0.37 kg / 0.82 LBS
371 g / 3.6 N
 2.23 kg / 4.91 LBS
~0 Gs
2 mm 2.20 kg / 4.84 LBS
3 407 Gs
0.33 kg / 0.73 LBS
329 g / 3.2 N
 1.98 kg / 4.36 LBS
~0 Gs
3 mm 1.89 kg / 4.18 LBS
3 165 Gs
0.28 kg / 0.63 LBS
284 g / 2.8 N
 1.71 kg / 3.76 LBS
~0 Gs
5 mm 1.32 kg / 2.91 LBS
2 640 Gs
0.20 kg / 0.44 LBS
198 g / 1.9 N
 1.19 kg / 2.62 LBS
~0 Gs
10 mm 0.43 kg / 0.94 LBS
1 503 Gs
0.06 kg / 0.14 LBS
64 g / 0.6 N
 0.38 kg / 0.85 LBS
~0 Gs
20 mm 0.04 kg / 0.10 LBS
483 Gs
0.01 kg / 0.01 LBS
7 g / 0.1 N
 0.04 kg / 0.09 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
51 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
31 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
20 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
14 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
10 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 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. Want to build a powerful holder? Apply two magnets instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the collision energy is extreme. The repulsion force is slightly lower than the connection force, but still significant.
*The magnetic induction between like poles drops to ~0 Gs at the geometric center of the gap (resulting from vector opposition).
* Figures apply to friction force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - warnings
MW 12.5x2 / 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
Mobile device 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 large risk to electronic devices as well as pacemakers. These NdFeB products produce a field that disrupts operation of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and glass. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: mechanical watches, remotes, membranes, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - warning
MW 12.5x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 28.30 km/h
(7.86 m/s)
 0.06 J
30 mm 48.53 km/h
(13.48 m/s)
 0.17 J
50 mm 62.65 km/h
(17.40 m/s)
 0.28 J
100 mm 88.60 km/h
(24.61 m/s)
 0.56 J
Neodymium magnets are prone to chipping – a collision with steel risks their cracking. Watch the impact speed – a magnet released freely becomes dangerous. Striking energy can destroy the magnet or painful pinches to skin. Be sure to control the product during mounting so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Surface protection spec
MW 12.5x2 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 12.5x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 810 Mx 28.1 µWb
Pc Coefficient 0.24 Low (Flat)
Total magnetic flux emitted by the pole surface. Essential parameter in coil applications as well as sensors. The Pc coefficient defines the magnet's operating point.

Table 11: Physics of underwater searching
MW 12.5x2 / N38

Environment Effective steel pull Effect
Air (land) 1.42 kg Standard
Water (riverbed) 1.63 kg
(+0.21 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Shear force

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

2. Steel thickness impact

*Thin steel (e.g. computer case) significantly reduces 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) = 0.24

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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: 010014-2026
Measurement Calculator
Force (pull)
Magnetic Field
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This product is an exceptionally strong cylinder magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø12.5x2 mm, guarantees maximum efficiency. The MW 12.5x2 / N38 component features high dimensional repeatability and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 1.42 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 13.89 N with a weight of only 1.84 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., 12.5.1 mm) using epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating 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 even stronger magnets in the same volume (Ø12.5x2), 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 Ø12.5x2 mm, which, at a weight of 1.84 g, makes it an element with impressive magnetic energy density. The value of 13.89 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.84 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 2 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Advantages and disadvantages of neodymium magnets.

Advantages

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • Their magnetic field is maintained, and after around 10 years it drops only by ~1% (theoretically),
  • Neodymium magnets are highly resistant to demagnetization caused by external magnetic fields,
  • The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnetic induction on the working part of the magnet remains very high,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
  • Possibility of individual machining as well as optimizing to specific applications,
  • Fundamental importance in advanced technology sectors – they serve a role in mass storage devices, brushless drives, medical equipment, as well as industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Cons of neodymium magnets: application proposals
  • At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • 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 secure oxidation and corrosion.
  • Limited ability of producing nuts in the magnet and complicated shapes - recommended is a housing - magnet mounting.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what contributes to it?

The declared magnet strength concerns the limit force, measured under ideal test conditions, namely:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with an ground touching surface
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction perpendicular to the plane
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual lifting capacity depends on a number of factors, ranked from most significant:
  • Distance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Steel thickness – too thin plate does not accept the full field, causing part of the flux to be escaped to the other side.
  • Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Thermal environment – temperature increase results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.

Warnings
Power loss in heat

Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. This process is irreversible.

Mechanical processing

Fire warning: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.

Pinching danger

Danger of trauma: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

No play value

NdFeB magnets are not suitable for play. Eating several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Health Danger

Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Powerful field

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Eye protection

Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Sensitization to coating

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness occurs, immediately stop handling magnets and wear gloves.

Keep away from electronics

A powerful magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a smartphone to avoid breaking the sensors.

Threat to electronics

Avoid bringing magnets near a wallet, laptop, or screen. The magnetism can irreversibly ruin these devices and wipe information from cards.

Caution! Need more info? Check our post: Why are neodymium magnets dangerous?