Checkline K-200 [K-200-E] Analog Metric Dial Thickness Gauge, Range 0-30mm, Depth Jaw 200mm, Feeler E For Sheet Metal, Etc.. Measuring Range: 0 - 30 mm / 0 - 1.00 inch, Resolution: 0.1 mm / 0.001 inch, Jaw Depth: 200 mm / 7.87 inch.  The Checkline K-200 thickness gauge features an easy to read analog display along with the high accuracy. The K-200 model is available with 5 different feelers, which can be found below. Measurement is done by a spring force. Opening by lifting device (lever) - self closing. The K-200 is ideal for determining the thickness of leather, textiles, cardboard, felt, rubber, sheet metal, foil, plywood, plastic, etc. Standard spring Force is 1.8N, however a Reduced Force Version offering 0.9N as well as a Increased Force Version offering 2.5N is available.