Description: 100% Brand new and high quality Hardened stainless steel All are heat treated All are specially hardened and fine ground. High precision measuring tools for square. Suitable for detecting angles and marking on parts. Specification: S#: 50x40mm M#: 75x50mm L#: 100x70mm Material: high carbon steel Package Included: 1 X Flat Edge Square Note:Due to manual measurement,please allow an error of 1-3mm.