Steel Rule Thickness 0.04 in Graduation Marks 0.5mm (1st 10 cm) 1/16 in 1/32 in (1st 3 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 +/- 0.006 in Includes Pouch Rule Type Rule Numeric Marks Inches Millimeters Numeric Format Decimal Length - SAE 12 in