This Incra Precision Centering Ruler allows you to find the exact center of any workpiece up to 12" wide. In addition to top and bottom micro-fine marking holes at every 1/32", the ruler also has a built-in protractor with guide slots at every 45, 30, 22.5, and 5 degree interval.
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Incra rulers feature micro-fine guide holes and slots at standard scale positions. Using a scribe or a 0.5mm mechanical pencil, these holes and slots allow you to place your mark with absolute precision. The incra rulers are made from ultra thin stainless steel with engraved lines and characters on a matt finish for easy legibility. We like them a lot. Made in USA.