Review on Powerful Neodymium Bar Magnets, Rare-Earth Metal Neodymium Magnet, N52, Incredibly Strong 33 LB Strength - 60 X 10 X 5 Mm, Pack Of 10 by Mike Campbell

These are very strong magnets, when stuck to a reasonably thick piece of metal they are very hard to remove unless you have a thin piece of stiff plastic to slip under them. Not the best choice for fridge magnets or holding shower curtains as they are just too strong to easily remove. For a lot of other uses though, they are great, one can easily hold a heavy tool! I have also used them to hold a curtain to the metal rails of a suspended ceiling just by holding the curtain up to the rail and sticking a magnet to the other side! Great for putting up curtains in an office setting with no need for tools. They will not hold as tight if the metal they are on is thin or has a heavy layer of paint.Remember though that magnets like this need to be handled carefully. Don't let them snap onto a surface or let two magnets fly together. They can hit hard enough to make the magnets shatter and send pieces flying! Also getting skin between two magnets can give you a nasty pinch. Swallowing magnets can be really bad, so don't leave them out where young kids or pets can get to them. I'd recommend handling them one at a time, don't leave two out on a table as they could fly together very fast if they get too close.