Abstract: Apparatus and method for setting knife blade depth. The apparatus comprises a magnification device and a removable tray in operative engagement with a digital micrometer. The method comprises the steps of positioning the edge of the knife holder flush with a fixed vertical plane extending through a reticle axis within the magnification device, zeroing the micrometer, rotating the micrometer handle until the tray and edge of the knife holder have moved a predetermined distance away from the fixed plane, and adjusting the knife blade until the edge of the knife blade is flush with the fixed plane.