also: こうしゃく
noun
steel ruler; steel scale
A measuring tool made of steel, used in engineering, metalworking, or precise measurement.
工場で鋼尺を使って部品の長さを測った。
I measured the length of the part with a steel ruler at the factory.
Compound of 鋼 (steel) and 尺 (measure, ruler). The reading こうじゃく is the standard on'yomi combination; こうしゃく is a less common variant.