Bullet Points: 1High-Quality Material: Crack Gauge Monitor is made of high-quality acrylic material, so it is durable, sturdy, smooth, wear-resistant, and not easy to break. 2Clear and Precise: Crack Monitor is designed with a highly clear acrylic sheet and an easy-to-read measurement grid, so it is clear and precise. It is very practical. 3Crack Monitoring: Corner Crack Monitor is a simple and cool analog crack monitoring device and a precision instrument used to monitor the horizontal or vertical movement of cracks on a plane. 4Great Purpose: To tell the story of 2D manual crack monitoring work. Crack Monitoring Gauge is used to monitor cracks in walls and how they evolve measured. 5Clever Design: Crack Measurement Tool consists of two boards that overlap for part of their length. The bottom plate is calibrated in millimeters, and the top plate is transparent and marked with a thin line cursor in the shape of a cross. Description: Crack Gauge Monitor is made of high-quality acrylic material, so it is durable, sturdy, smooth, wear-resistant, and not easy to break. It can monitor cracks in walls and how they evolve measured. Specification: Material: Acrylic Size: about 10*3*0.9cm/3.94*1.18*0.35inch Weight: about 50g Uses: Can be used to monitor wall deformation/cracks Packing List: 1pcs*gap gauge Notes: 1. Due to the different display and lighting effects, the actual color of the product may be slightly different from the color shown in the picture. 2. Due to manual measurement, please allow a measurement deviation of 1-3cm. _x000D_