Graph Datum is a leading cast iron surface plate manufacturer in India, specializing in precision-engineered, ribbed cast-iron metrology bases. Their surface plates are stress-relieved for dimensional stability, feature hand-scraped or machined surfaces, and conform to strict flatness grades, making them ideal for inspection labs, tool rooms, and industrial use. With custom sizing, robust build, and reliable performance, Graph Datum delivers durable reference surfaces that drive accuracy and quality.