Steel Rule Thickness 0.05 in Graduation Marks 0.5 mm 1/64 in Coating Chrome Graduation Color Black Flexibility Rigid Graduation Mark Style Etched Folding Rule Type Not Applicable Backing Material Not Applicable Finish Satin System of Measurement Metric/SAE Features Quick Reading Rule Type Rule Numeric Marks Inches Millimeters Numeric Format Decimal Fractional Length - SAE 19 1/2 in Length - Metric 500 mm Width - Metric 29 mm Graduation Units Inches Millimeters