Steel Rule Thickness 0.07 in Graduation Marks 0.5mm (1st 10 cm) 1/32 in (1st 3 in) 1/64 in 1 mm Coating Clear Graduation Color Black Flexibility Rigid Graduation Mark Style Etched Edge Style Square Orientation Horizontal Folding Rule Type Outside Read Finish Not Applicable System of Measurement Metric/SAE Features Non-Glare Surface Accuracy +/- 0.009 in Includes Pouch Rule Type Rule Numeric Marks Inches Millimeters Numeric Format Decimal Length - SAE 48 in