I have a whole set that were my grandfathers, he was a mechanical engineer among other things and he built liquid O2 trailers in our barn, again among other things. (They made every part except bearings.) He also desinged and built a lot of the machinery they put in Bethlehem Steel when building it. All the tool I have from him are the best. Even good measuring tools should be calibrated from time to time.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!