Monitors is with a highly clear ABS sheet and easy-to-read measurement grids, so it is clear and precise. It is very practical Because our Monitorings Gauges can Monitors cracks in wall and how they evolve measure, it is very practical and for you You can use our Corner Monitors to Monitors the horizontal or vertical movement of cracks on a plane. It is a precisions instrument Gauges Monitors is crafted from ABS, so it is wear resistant, smooth, wear-resistant, and not easy to break The bottom plate of our Measurement Tool is calibrated in millimeters. It also have a clear top plate, which is marking with a thin cursors in the shaped, Manufacturer: REITINGE