I assume you mean 12" thick. Answer = Yes. In low gear(3 speed) I can turn a 7/8" Lennox ship auger (Greenlees don't stand up to the nails as well I have found) through just about anything (with a reasonably fresh battery and I do have to clear the hole a couple of times and it does bog a little on the thick hard stuff but it will do it). It really does have an enormous amount of torque for a cordless. If it snags on something and your not braced for it it can hurt you. I wouln't want to use it up drilling out entire houses with it (that is hole hawg territory-much faster) but as I said before it is an excellent tool for attic or basement crawls.