"peter" wrote in message
ups.com...
Maybe I dreamed this, but I'm sure I remember seeing advertised a
gadget in two parts which you could place either side of a surface to
show you where a drilled hole will exit on the blind side.


Put a 1/8th drill bit in a drill ... drill hole through material .... go to
other side ... where drill is sticking through is where the hole will exit
:-)