The search magnets / retrieval magnets have been specially developed for this purpose. An extra-thick steel casing ensures a strong concentration of the magnetic field and therefore additional adhesive force. In addition, the resulting higher weight of the magnet has the effect that the magnet is always perfectly aligned downwards when released.
This product is a double retrieval magnet that has an extremely strong magnet on both sides.
You can use it to retrieve objects under water, e.g. from rivers, boat moorings, lakes, wells, etc.