This precision 300 mm 12" english/metric 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 1.00" wide by .036" thick.
It has a "high-contrast" black 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.
Has .5mm and mm markings on one side and 1/32 and 1/64 on the reverse. Graduations are precision photo etched and then white filled for easy readability.