100% made in the USA by Products Engineering Company (PEC Tools), a premier US tool manufacturer 6" rigid 4R machinist ruler has a satin chrome finish that will resist scratches and rust It is made from the finest hardened and tempered stainless steel 4R graduations are precision photo etched and black filled and show 32nds and 64ths on one side and 8ths and 16ths on the reverse Rigid rule is .750" wide and .035" thick. Both long edges are ground flat and straight This precision machinist rule is made in the USA by Products Engineering Company (PEC Tools), a premier US tool manufacturer. It has a satin chrome finish for scratch resistance and rust resistance. It is made from the finest stainless steel available and is hardened and tempered. Graduations are precision photo etched and then black filled for easy readability. 4R graduations show 8ths and 16ths on one side and 32nds and 64ths on the reverse Rule is .750 inches wide and .035 inches thick. Both long edges are ground flat and straight. This is a premier US made ruler.