Magnets are strong, yes, but only at close range. This makes them useless for projects where you may have any significant material between the magnet and the object you wish to attract.Let's say you want to make a knife holder and put the magnet behind the wood. Won't work unless you are using something like 1/8 ply.Let's say you take a router and cut a grove in a chunk of wood and embed the magnet flush, then these are perfect but you can see the magnet.Remember these are magnets, not miracles.See full review