We stock fishing magnets in all different sizes and designs. Our inhouse made solutions offers the most optimal products for magnet fishing.
Regarding our stated lifting forces:
We test all of our products strength on a 10mm thick iron plate with a perfect lift upwards, in optimal conditions. When looking for metals under water, you might not get a optimal hit (on a metal bar or uneven surface for example), this will of course reduce the weight that the product can lift. Rust also has a big affect on the force and most things under water has alot of rust. When it comes to rust on the magnet, make sure to wipe it after use. This extends the life of the product.