I'm always looking for a bargin, and when I saw Woodcraft has a combo square on sale half price - for $12, I couldn't resist.
I have an old Stanley combo square, and a small 4" double square from Lee Valley. This one had the center and protractor head, which I don't have. (I do have a plastic center finder.)
Well, after buying it, I returned it. In the plastic case, the exposed side showed centimeters. Once I opened it, I saw the side for inches. The markings only went up to 1/16." If you wanted measurements to 1/32 or 1/64 graduations - you have to use your eye.
I returned it after opening it. Just for chuckles, I checked out the same 3-head combo at Harbor Freight. It was $21, came in a wooden case, and the ruler was marked to 1/64."
Buying the woodcraft item for the regular price is foolish. Perhaps it's worth $12, but not to me.
YMMV