Tell the story of 2D manual crack monitoring work. Crack monitors are used to monitor wall cracks and their evolution. Designed with highly transparent acrylic panels and easy-to-read measurement grids, our crack monitors are clear and precise. This is very practical . You can use our corner crack monitor to monitor the horizontal or vertical movement of cracks on a flat . It is a instrument. The crack measuring instrument is made of high-quality acrylic material, which is , strong, smooth, wear- and not easy to break. The base plates of our crack measurement tools are calibrated in millimeters. It also has a transparent top plate marked with a -shaped thin line cursor., Weight: 0.24030386558 Pounds, Manufacturer: Tuidzljd