Magnify and measure in one operation. Two lenses provide distortion-free viewing. This loupe includes a general purpose scale that measures circles from 0.002" to 0.0625"; radii from 1/16" to 3/8"; angles up to 90° in 5° increments; lengths up to 0.5" in 0.005" increments; lengths up to 10 mm in 0.2 mm increments; and line widths from 0.016" to 0.250".

Optional thread accuracy scale measures the following threads per inch: 50, 32, 28, 24, 20, 18, 16, 14, and 8.