Made in USA Starrett Model No. 13A 4\” size With Graduated Blade Only 4R Graduations – Quick Reading 8ths, 16ths, 32nds, 64ths Satin Chrome Finish blade Product Description Specs The Starrett Inch Reading Double Square is very popular with machinists, toolmakers, & patternmakers. The sliding blades are adjustable making it practical for a wide variety of uses. The faces of the head are ground square. 4\” Size. Model 13A. Made in USA. Product Model # Starrett Inch Reading Double Square, 4\” Size – 13A 13A | EDP #: 50109 For California Residents: WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood