sile või laia alusega ja täisnurga all asetseva haaraga mõõtevahend nurkade kontrolliks lukksepatöödel, steel square is a tool that carpenters use, and they use many tools to lay out a "square" or right-angle, many of which are made of steel, but the title steel square refers to a specific long-armed square that has additional uses for measurement, especially of angles, as well as simple right-angles, terasest, keraamikast või graniidist nelinurkne plaat täisnurkade kontrolliks, angular metal plate or casting for clamping and supporting work in metalworking machines, work holding device used as a fixture in metalworking