Mountlaser Gap Measure Crack Ruler, Concrete Gauge Width Pack of 5

【Full Range Crack Width Comparison Scale】Covers 0.1mm to 7.0mm gradient width strips, standard black bar graduations allow quick visual matching to check concrete wall crack, gap and fissure size accurately on site. 【Double Scale Design for Dual Measurement】Equipped with linear millimeter main scale on top for direct length reading and width comparison bars below, meets all building structural inspection measuring demands. 【Clear Permanent High Contrast Printing】High-resolution screen printing on transparent rigid plastic, black markings never fade or blur under sunlight, damp and abrasion for long-term field use. 【Portable With Protective Storage Pouch】Total length: 160mm, slim lightweight body. Comes with a glossy red leatherette case to prevent scratches, easy to carry in tool bags and pockets for outdoor work. 【Ideal Tool for Construction & Survey Professionals】Perfect for building surveyors, civil engineers, property maintenance teams, widely used in wall crack monitoring, pavement inspection, house acceptance and structural safety checking.