Description This precision measurement ruler combines transparency measurement tool and flaw detection film for professional use in defect detection. Its high precision line ruler design allows accurate sec defect measurement, diameter measuring, and crack width estimation for tasks in manufacturing, lab analysis, and maintenance. The durable material ensures clarity and reliability in monitoring fine lines, scratches, and surface flaws. Features -Color:Multi -Material:Plastic -Size:11.00X8.50X0.10cm/4.32X3.34X0.04in -High precision detection: utilizing a high precision measurement tool, this multifunctional ruler precisely measures minor flaws, sec defects, and crack widths for reliable inspection results -Versatile measurement needs: combining a linear ruler and diameter measuring tool, our product supports sec size estimation, film measurement, and defect charting in various construction or laboratory settings -Durable and transparent design: special transparency measurement tool made from wearresistant and scratchresistant material ensures lasting clarity, ideal for complex workspaces -Quick visual comparison: the sec measurement chart and flaw detection gauge provide immediate contrast for detecting dirt, scratches, or cracks, improving the efficiency of flaw detection -Accurate crack evaluation: this crack width measurement ruler allows precise crack width gauge meter readings, supporting detailed repair assessments and maintenance decisionsPackage list: 2 x Crack Width Rulers