Kikki's Workshop Q&A: Let's ask Kikki ! Kikki's Workshop
What is the purpose of the lifting magnet ?
When a concrete building is scrapped, many chunks of concrete and metal get produced. These chunks are not useful as is, but if we separate concrete and metal we can recycle both materials. The lifting magnet can separate metal from the pile of junk using the powerful magnet.

You can learn more about the lifting magnet in "Everything About Construction Equipment" !