Magnetic Holding Blocks

[Sleykin]

Thank You sleykin. They do have what looks like 2 drill marks on one end. I'm thinking those are the magnetic source.
I do have a rather large rare earth magnet, 3x3x2, you must be really careful with it, can smash fingers! Could that be used?
Ken

Possibly, but without more info I can't tell. Might have to take them apart to charge them. Old computer hard drive magnets might work as they are like a flat horshoe magnet and it makes them a one sided magnet...