Steel Rule Spring Tempered 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 Includes - Rule Type Rule Numeric Marks Inches Millimeters Numeric Format Decimal Fractional Length - SAE 12 in Length - Metric 300 mm Width - SAE 1 in Width - Metric 25.4 mm