Checkline JD-200 [JD-200-A] Digital Dial Thickness Gauge (0-10mm / 0.400"), Resolution 0.01 Mm / 0.001 Inch, Jaw Depth 200mm Supplied With Feeler "A" (30mm Flat). Measuring Range: 0 - 0.500" / 0 – 12.50 mm, Resolution: 0.001", 0.01 mm, Jaw Depth: 200mm / 8". JD-200 Dial Thickness Gauge is used to determine the thickness of leather, textiles, cardboard, felt, rubber, sheet metal, foil, plywood, plastic, etc.