Shinwa 12" 300 mm English Metric Rigid (1.250 wide x .040 thick) Zero Glare Satin Chrome Stainless Steel E/M Machinist Engineer Ruler/Rule with Graduations in 1/64, 1/32, mm and .5mm Model H-3412C 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. .5 mm, 32nd and 64th markings are precision photo etched and then black filled for easy readability Rule is 1.250" wide and .040" thick Conforms to Japanese Industrial Standard (JIS) B 7516 Grade 1