At 6" × 12", the large precision square has the accuracy of an engineer’s square (0.001" per inch of length), with all four edges ground and both faces graduated on the inside and outside edges. For ease of reading, the markings are etched and blackfilled.
The chrome-plated high-carbon steel legs can be marked upon with pencil for direct-reference use. The interior corners are relieved to ensure that the square seats well, even over saw whiskers. Beyond being useful for layout work, it will let you check if surfaces are flat or straight, and can measure and check for square on the same plane.
Available in Imperial only, it has 1" wide legs graduated in 32nds on the 6" leg and in 16ths on the 12" leg.
Made in USA.