N42 Neodymium Pot Magnet - 12mm Dia X 4.5mm Thick X 3mm Countersunk - Pack Of 4

This magnet has a pull strength of approximately 3.9kg (8.6 lbs). This is the force required to pull the magnet directly away from a thick steel plate under ideal conditions.

You will need a 3mm screw to fit the countersunk hole for mounting the magnet.

The corrosion-resistant coating provides protection, making them suitable for many outdoor applications. However, prolonged exposure to harsh weather conditions may still cause degradation over time.

For light to medium weight doors or cabinets, yes. For very heavy doors, you may need stronger magnets or multiple magnets to achieve adequate holding force.

Handle magnets with care. Keep them away from pacemakers and electronic devices. Avoid pinching fingers between the magnet and a ferrous surface, as the force can be substantial.

N42 refers to the grade of the neodymium magnet, indicating its magnetic properties. Higher numbers generally signify stronger magnetic force.

Yes, if the metal door is ferrous (made of iron or steel), the magnet will attract to it directly. If you need to fix the magnet itself to the door, you would still use the countersunk screw if the door surface is non-magnetic (e.g., painted wood).

Ensure the opposing surface is made of a ferrous material (iron, steel). Check that the magnet is properly screwed into its mounting surface. Verify that the item to be held is magnetic.

Confirm you are using a 3mm screw. Ensure the screw head is countersunk to sit flush within the magnet's hole.

Inspect the extent of the damage. Minor scratches may not affect performance, but significant damage could lead to corrosion. Clean gently and monitor for rust.

Ensure the gap between the magnet and the ferrous surface is minimal. Remove any non-magnetic material obstructions. Verify the opposing surface is sufficient for the magnet's pull strength.