I’ll go along with what treasure hunter said, but I use the Garrett Pro Pin Pointer.
I like the depth on the pro pointer (about 2 inches).
For me, what is the use of a pin pointer that reads 6 inches deep. The ideal is to pin point the target. I do see where a 6 inch pin pointer would have it’s uses, but for me I want to zero in on the target as fast as possible and do as little digging.