Forensics Source 6-3875 ABFO No. 2 Bitemark Scale Forensics Source is the largest forensics manufacturer, supplier and innovator in the field. Our extensive line of offerings makes us the worldTMs premier marketplaces of supplies and equipment for professionals in forensics, crime scene investigation, law enforcement, criminal justice, and corporate security Forensics Source 6-3875 ABFO No. 2 Bitemark Scale Features: The 1cm ision lines are traced and extended across the photographic print to grid an image. Measurements within the image are then made relative to these inscribed 1cm grid lines to compensate for any distortion resulting from non-parallelism between the film and the object planes. Alternating black and white bars 1cm permit measurements from grossly over- and under-exposed photographs. Scale has become the standard for bitemark measurement and photography