This Mitutoyo Digimatic digital caliper features super-thin stainless steel jaws that measure ID and OD from 0–152mm (0–6") with .025mm accuracy; it provides readings in inches and millimeters. The caliper has a resolution of .0005" (.01mm), and has a zero set button, making easy work of relative measurements. A comfortable thumb wheel and lock make it easy adjust to your desired measurement and lock it in to transfer that measurement to other materials. This caliper includes a protective case and battery (SR44).