1. INNOVATIVE FEATURES: The sophisticated design of our grout monitor, featuring a transparent plate and double plates, enables precise tracking of opening and closing joints. Accurate data is recorded on the included log sheet using the thin wire cursor and by removing two nails. 2. PRECISE MONITORING: With a horizontal range of 20 mm (0.79 inches) and a vertical range of 10 mm (0.38 inches), our gap monitor ensures accurate readings at a resolution of 0.5 mm (0.02 inches). The XY axis scale of 1 mm (0.04 inches) and the scale wire contribute to precise monitoring. 3. EASY TO USE: Thanks to its improved stability and userfriendly design, including newly designed mounting posts, our grout monitor allows for precise placement without glue or complex assembly. The two plates can be easily and conveniently attached to each other. 4. STABILITY: Our grout monitor delivers accurate monitoring results through advanced technology. Constructed from quality ABS and acrylic materials, it offers exceptional durability and stability. The design ensures easy reading of recorded data.