I bought this to magnetize weapons and similar on miniatures. It works great, just as described. These magnets are useful for small things like shields/weapons on miniatures. The diameter of the magnet is about a hair shorter than the wrist width of Games Workshop's Morannon Orc to give you an idea (I used shield magnets on it and it worked great). However, they are quite expensive for what they are. You will probably find many magnets of the same type cheaper elsewhere - hence the 4 stars.