Measuring Range: 0 - 0.500" / 0 – 12.50 mm, Resolution: 0.001", 0.01 mm, Jaw Depth: 200mm / 8". The JD-300 is a digital thickness gauge with a deep throat for measuring leather, textiles, cardboard, felt, rubber, sheet metal, foil, plywood, plastic, etc. Available with rollers, inquire for details.