6 X 1/2″ 5R flex rule ~ Made from the finest steel available. ~ Fully hardened, tempered and chrome finished. ~ Precisely etched for accuracy and readability. ~ 32nds & 64ths, 10ths & 100ths 6 X 1/2″ 5R flex rule Made from the finest steel available. Fully hardened, tempered and chrome finished. Precisely etched for accuracy and readability. 32nds & 64ths, 10ths & 100ths