This precision 24” 16R rigid ruler is made in the USA by Products Engineering Company (PEC Tools), a premier tool manufacturer. Rule is made from spring tempered and hardened steel and is 1.20” wide by .042” thick. It has a “high contrast” satin chrome finish that provides better rust resistance than polished steel and can be easily read in both low and bright light conditions. The sides of each rule are ground parallel and each end is accurately ground square to allow reading from either end. 16R graduations have 1/50” and 1/100” on one side and quick-reading 1/32” and 1/64” on the other. Graduations are precision photo etched and then black filled for easy readability.