Magnet Ball

I use this to house a strong rare Earth magnet. Off memory the magnet is 20mm*20mm*20mm. By themselves they bang and clank together and are so brittle they break.

I put this ball in an old sock or similar and use to pick up nails and other rubbish or swing around on the floor when I drop something small they can pickup.

I'd upload a photo of the one I have but can't find it. Usually turns up after years stuck to a chair leg somewhere.