Straight Edge Flatness Tolerance Not Applicable Calibration Certificate Not Certified Straightness Tolerance 3 micron Parallelism Tolerance Not Applicable Thickness 0.32 in Coating Chrome Flexibility Rigid Edge Style Beveled Color Black Backing Material Not Applicable Finish Satin System of Measurement Metric/SAE Includes Case Length - SAE 9 13/16 in Length - Metric 250 mm Width - SAE 5/16 in Width - Metric 8 mm Magnetic Nonmagnetic Material Stainless Steel