Perfect small-size tools for checking or setting 90 degree angles4" double square, accurate and adjustableMeasuring tools have working surfaces ground to a demanding /- .00001"All rules are marked with 1/64", 1/32", 1/16", and 1/8" graduations
This square is very popular with machinists, toolmakers, and patternmakers. The sliding blades are adjustable making it practical for a wide variety of uses. The faces of the head are ground square, and the 6" (150mm) size has a level.
Brand: Starrett, Model: 13A