Crack Width Ruler - Color: Blue

Key Features :- Credit-card sized for pocket portability. Transparent material for clear crack overlay. Graded lines from 0.10-2.50mm (0.004-0.100 inches). Simple visual matchinga no tools needed. Durable plastic withstands job site conditions. Measures walls, floors, corners effectively. Low-cost microscope alternative. Internal/external use versatility. Protective case included for storage. Conforms to ISO quality standards. This simple gauge has been designed to provide inspectors with a low cost alternative to a graduated microscope for determining the width of a crack in a concrete or other building materials. Similar in size to a standard credit card, this transparent gauge is marked with a range of graded lines. Each line is a specified width. To use, position the gauge over the crack and identify which line is a similar width to the crack. Read off the width value.