Review on 🏗️ Starrett RS 24 L Shaped Rafter Framing: Robust Construction for Superior Rafter Accuracy by James Trapkin

Totally inaccurate. I've thrown away better squares than this one. The numbers are drawn, which sucks because they wear out with use. It would still be okay if the numbers were actually measured to the centimeter. When other rulers were placed alongside, the inch markings varied from Starrett's square to 1/16th of an inch. The last inch added to the end of the long side of the 24" was 1-1/16" but the total length of the side was 24" when measured with another ruler and tape measure. Was it square? Never checked, you couldn't measure 12-16-20 on the square because the markings were so wrong. You would be different if you flipped it too. 10 inches on one side does not measure 10 inches on the other.