Review on Precision Machinist 30°Lathes Calibration Inspection by Daryl Fitch

Okay so they seem pretty accurate to me. I don't have a sine ruler to measure but they fit my high quality protractor. They were well packaged, wrapped in non-corrosive wax paper, in a sturdy wooden box with foam liners. One weird thing that annoys me a little is that they are labeled on the wrong side. When placed in a box, the labels are on the back. So you open it and you have to turn it over to read it. Another deal (didn't think of that when ordering) it would be nice to have 45 in the set.