Durable high quality acrylic gauge monitor - Material and durability Made from high quality acrylic, this gauge monitor is durable, robust, smooth, and resistant to breakage. - Clear and precise readings The device uses a clear acrylic sheet with an easy-to-read measuring grid for accurate and practical measurements. - Practical purpose Designed to document the work of manual monitoring and to monitor cracks in walls and track their development over time. - Two-board design Consists of two boards that overlap along part of their length. The lower plate is calibrated in millimeters, while the upper plate includes a thin-line cursor in the shape of a cross for precise alignment. - Easy to use Simple setup and clear readings help ensure reliable measurements without confusion. - Use scenarios - Construction or renovation projects to monitor crack progression in walls - Ongoing structural monitoring to detect movement or settlement - Masonry or carpentry tasks requiring precise measurement and alignment