A Missing Link, 31 Charon Dr, North Smithfield, RI 02896, US

Based in Slatersville, R.I., Comtorgage Corporation has been manufacturing bore gages since 1928. It manufactures a variety of customized gages, including the Comtor Groove Gage, Comtor Spline Gage and the Comtor Thread Gage. The firm also manufactures amplifiers and settings masters. The bore gage manufactured by the Comtorgage Corporation offers solution to various gaging applications and precision measurement of deep bores, shallow counter-bores, large or small diameters in either two-point or three-point contact. Comtorgage Corporation has designed the Comtorgage System, which comprises three basic components, including an expansion plug for sensing size variation, an amplifier to display this variation and a reference ring for setting the gage to the mean dimension.