4. Subdermal Implants
Sub dermal implants are simply implants done beneath the skin and they are usually made from silicon or Teflon. In order to instill these implants, a glorified spatula is used to make a hole in your fresh before cramming an implant in there.
The only good thing with these types of body modifications is that you can choose any shape you ever wished to have in your skin. For instance you can wish to have a pair of brass knuckles or horse shoe.