The Mini Scribe makes it easy to maintain a consistent scribe in those tight and difficult areas, staying parallel to the object surface every time. The Turning-Cam allows you to adjust the measurement on either side of the Mini Scribe, the steps represent an 1/8" making it easy to get up close measurements every time. Need a marking gauge? Simply flip the Turning-Cam and run the Mini Scribe lip along the edge and get the perfect line!