• Length: 12"/300 mm • Two rare earth magnets attach firmly to the blade • Indent next to the magnets for the blade set • 1 / 16 " and 1 / 32 " and 1 mm increments on front side • Ruler end has 1 / 16 "/1 mm markings for use as a height gauge • Drilled holes in 1 / 2 " increments on back side • Use the tool as a compass to draw circles up to a 23" diameter for bowl blanks • Includes sliding stop, that allows for drawing cut lines parallel to an edge • Aluminum base with blue anodized finish • Laser engraving on both sides • Can attach directly to your saw for storage and easy access