Rigid Rule Thickness 0.04 in Graduation Marks 1/64 in Coating Chrome Graduation Color Black Flexibility Rigid Graduation Mark Style Etched Edge Style Square Orientation Horizontal Folding Rule Type Not Applicable Backing Material Not Applicable Finish Satin System of Measurement Metric/SAE Accuracy +/- 0.008 in +/- 0.2 mm Includes Pouch Rule Type Rigid Rule Numeric Marks Inches Millimeters Numeric Format Decimal Length - SAE 6 in Length - Metric 152.4 mm Folded Length 6 in