1. Ingenious Design With a transparent plate, two plates, and a thin wire pointer, our grout monitor accurately logs the opening and closing of joints. Simply remove two nails, and the log sheet provides precise data. 2. Improve Accuracy in Inspection Achieve precision with our gap monitor, featuring a resolution of 0.5mm (0.02') and a wide horizontal range of 20mm (0.79') and vertical range of 10mm (0.38'). The XY axis scale is 1mm (0.04'), and the scale wire ensures accurate, optimized measurements for your inspection needs. 3. Easy to Use Thanks to its improved stability and userfriendly design with newly designed mounting posts, our grout monitor enables precise placement without glue or complex assembly. Attach the two plates effortlessly and conveniently. 4. Advanced Technology Carefully selected materials ensure easy data reading. Made of quality ABS and acrylic, our monitor guarantees exceptional durability and stability.