Our Professional Crack Monitoring Gauge delivers precision and reliability for tracking structural cracks in walls and corners. The tool features two overlapping plates—a calibrated bottom plate in millimeters and a transparent top plate with a crosshair cursor—enabling accurate measurements within ±0.5 mm (±0.02"). With a horizontal range of ±20 mm and vertical range of ±10 mm, it supports detailed, long-term crack evolution analysis. The redesigned fixing column enables glue-free installation, and the high-polymer construction ensures durability. Includes a crack record sheet, screws, adhesive, and instructions for immediate use. Trusted by engineers and DIY enthusiasts for effective structural assessment.