Shinwa 6" 4R Rigid (.750 wide x .035 thick) Zero Glare Satin Chrome Stainless Steel 4R Machinist Engineer Ruler/Rule with Graduations in 1/64, 1/32, 1/8, 1/16 Model H-3001A 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. 8th. 16th, 32nd and 64th 4R markings are precision photo etched and then black filled for easy readability Rule is .750" wide and .035" thick Conforms to Japanese Industrial Standard (JIS) B 7516 Grade 1