This Dial Caliper/Case Length Gauge is used to measure items without marring the surface. It features fiberglass-reinforced super polymid construction. It has a range of 0-6" (0-150mm), and provides direct .001" readings. Graduations in .001" increments with 0.100" per single revolution of dial, and a 1.0mm bar scale. The dial is adjustable to zero. Four-way measurements: outside, inside, depth and step. A comfortable friction thumb roller opens and closes caliper. Large, black numbers and markings on a white background are easy to read. The Dial Caliper/Case Length Gauge comes with a fitted clear plastic storage case. Imported.