Mechanical Calipers Small 270×320 Medium 540×640 Large 864×1024 Download Tiff Original 2025×2400 | (337.4 KB) Description This caliper was commonly used in projects that required great precision. The object of interest is placed in the opening, measured and then removed. Keywords caliper, mechanical, precision tool, tool Galleries Woodworking Tools Source: House of Representatives Report of the Commissioner of Patents for the Year 1860 (Washington, DC: George W. Bowman, 1861)
