
I received a pack of 10 just to hold a warped 5mm timber. After about a month of use I can say without a doubt that they are not as strong as described. I would return it but found a way to use them for my purpose (by stacking them in a checkerboard pattern) but even then they are extremely weak with a strong seal between the magnet and the metal surface. Extremely disappointed and the product information is dead wrong. The brand I'm considering is DIYMAG and the headline reads Super Strong Neodymium Fishing Magnets, 95 lb (43 kg) pull force.

Powerful Neodymium Bar Magnets With Double-Sided Adhesive - Ideal For Home, Office & Scientific Uses - Pack Of 16 Magnets
40 Review

50Pcs Neodymium Magnets With Countersunk Hole And Stainless Screws - Strong Rare Earth Magnets Disc For Locker, Tool Storage, Crafts By MIKEDE
42 Review

MIKEDE 8-Pack Powerful Neodymium Magnets With Double-Sided Adhesive - Ideal For Fridge, Crafts, DIY, Science, Building & Office Projects - Rare Earth Magnets For Strong Grip
39 Review

50Pcs Strong Neodymium Magnets With Hole & Mounting Screws - Heavy Duty Rare Earth Disc Countersunk For Locker, Tool Storage & Crafts
31 Review