It was right out of the box. I placed it on the new frame square and read 90.0 inside and outside the frame. I needed to add filler to the top of my newly renovated kitchen cabinets, which cut the cabinets to the ceiling. Since I had a corner cabinet, I needed something to give me the exact angle between the cabinets. I then split the angle in half and this gave me fine adjustment of the miter saw. I set the protractor to that angle, tightened it, transferred the tool to the miter saw, set the…