Mountlaser Crack Monitor, Measuring Tool, Width Ruler, Gap Pack of 5

【Multi-Range Precise Crack Width Measurement】Covers measuring range from 0.01mm up to 2.20mm, with line width scales and dot diameter comparison charts. Quickly check wall crack width, gap size and tiny crevice dimensions for building inspection work. 【Double-Sided Clear High Definition Printing】Adopts high-resolution screen printing technology, black marks against transparent base deliver sharp contrast. Scales will not fade or blur after long-term outdoor use, ensuring accurate visual comparison every time. 【Compact Portable Pocket Size Design】Single card dimension: 95mm × 60mm (3.74in × 2.36in). Slim lightweight cards are easy to put into tool pockets, wallets or survey kits for on-site building maintenance and structural checking. 【Transparent Flexible Durable Material】Made of tough flexible plastic sheet, waterproof, dustproof and wear-resistant. Bendable without breaking, suitable for all construction sites, indoor and outdoor structural inspection scenarios. 【Wide Application】Ideal for civil engineers, building surveyors, property maintenance staff. Widely used in concrete wall crack monitoring, building structure detection, pavement gap inspection and house renovation checking.