Wide Carpenter's Square with Hard Chrome Finish and Metal Stopper - 20" x 10"The carpenter's square has long been an indispensable tool in Japanese construction and a mark of a master craftsman's skill and technique. Its a dynamic measurement tool with uses that go beyond merely scribing a line. This Shinwa Carpenter's Square features a metal 90 45 degree stopper, so you can use it for marking parallel to an edge or at 45 degrees, as a caliper, or turn the stopper the other way around and use it as a height gauge. The stopper