Measuring Range: 0 - 1 in (0 - 25 mm), Resolution: 0.0005 in (0.01 mm), Jaw Depth: 19.70 in (500 mm). The Checkline DMD-850-1 Digital Thickness Gauge is used to determine the thickness of leather, textiles, cardboard, felt, rubber, sheet metal, foil, plywood, plastic, etc. Self closing thickness gauge with high accuracy and resolution.