The SKS Optic 10x Pocket Comparator contains a triplet lens system which provides an extremely flat field of view over the entire reticle area. This insures accurate measurements. An etched glass reticle provided at the bottom of the plastic skirt enables simple, accurate and direct measurements. Standard scale ranges from 0 to 0.8" in .0025" increments. Please specify inch or metric scale. Comes with a semi-rigid carry case.