Scot I'm not the sharpest tack in the box, but I use a pointed probe, (The part of the state I live in you have to) but if I ever pushed hard enough to chip or crack a piece of buried tombstone rather than push slowly and gently, not knowing how deep it is, I believe I should quit probing altogether. Jack E Briles Sr Floyd Co. In. _jackbriles@aol.com_ (mailto:jackbriles@aol.com)