These magnets are easily mounted with screw through contersunk hole and are powerfull.

Great magnets...not toys. Will keep buying as they work better than expected.

Great High Strength Magnets... I have used them for a number of tasks in the past, from a Simple Stud Finder because the magnets are so Strong they easily locate any screws or nails used to secure wall sheeting to the Studs... which make for a simple and very effective Stud Finder. Also for Door holds, by screwing a Small High Strength Magnet to a Door, then any small piece of metal to whatever you want to hold the Door to. Also particularly Great to insert a couple of Small High Strength Magnets into each edge of double screen doors (top, middle & bottom), then they hold the double screen doors closed perfectly aligned... and the screen doors Attract each other when closing.