Shinwa H101-E 600 mm Rigid"Zero Glare" Metric Machinist Ruler/Rule Scale .5 mm & mm Made from the finest stainless steel available and is hardened and tempered Has a zero glare satin chrome finish which makes it easy to read and will prevent corrosion mm and .5 mm markings are precision photo etched and then black filled for easy readability Rule is 30 mm wide and 1.2 mm thick Conforms to Japanese Industrial Standard (JIS) B 7516 Grade 1