Both pics are magnetic implants, the first is used on the only other language article:

https://commons.wikimedia.org/wiki/File:Implantation_eines_zylindrischen_Magnet.png

Biohacker Mrln implants a commercially available biomagnet

Based on the other images, the side of your hand seems to be a popular location for magnets too:

Also, the latter image is probably the result of the first operation image (in my other comment) because the subtitle says:

Multiple subdermal magnets implanted by bioacker Mrln [sic]

But what is a little weird is that the magnet seems to be on the “wrong” side. I think the first operation image is just misleading.

Edit:

The upper image (in this comment) is also by Mrln. Apparently they installed a lot of magnets.