INCRA Precision Specialty Rules - 12" Centering Rule
In addition to top and bottom micro-fine marking holes at every 1/32" it also has a built-in protractor with guide slots at every 45 degrees, 30 degrees, 22.5 degrees, and 5 degrees interval.
Rules are as thin as business cards to completely eliminate the
parallax problems of thicker rulers, and they're flexible to conform to
work that's not flat.
Made in USA. Questions? Call: 1.888.804.6272