>>23086288>i can dig a hole at the range a metal detector hasThe point I made with that is that you can find out what's below your feet that is buried with other material. I can't believe I'm having to explain such a simple concept.
>i just want clarification for what's the range of the instruments that you postedHere.
https://en.wikipedia.org/wiki/Earth%27s_inner_coreAs you can see, it says exactly the same thing I posted in a reply to you.