Invented by Starrett in 1877, the combination square is hailed by it's maker as "one of the world's most practical and versatile tool inventions - the basic tool for every builder and craftsman." We couldn't agree more. It is indispensable for everything from setting machines to laying out precision joints.
The bearing and measuring surfaces of the tool are machined tolerances so fine (.0001") you can be absolutely confident in the accuracy of the readings. The cast iron heads have a handy spirit level and hardened scriber. The etched steel rule has an easy-read, no-glare chrome-satin finished, and graduated in 8ths, 16ths, 32nds, and 64ths. USA