1. Clear design and purpose - Transparent top plate combined with two plates and a thin wire pointer allows precise logging of joint opening and closing. After removing two nails, the protocol sheet provides accurate data for each measurement. 2. Enhanced measurement precision - Resolution: 0.5 mm (0.02 in) - Horizontal range: 20 mm (0.79 in) - Vertical range: 10 mm (0.38 in) - XY scale: 1 mm (0.04 in) with scale wire for high precision readings 3. Easy setup and stability - Two plates with redesigned mounting posts fasten together easily - No glue or complicated mounting steps required, improving ease of use and reliability 4. Clear and reliable results - Delivers precise monitoring with advanced technology - Produces accurate and clear results every time - Built for durability and stability using high-quality ABS and acrylic materials 5. Use scenarios - Tile and grout work: monitor grout joint opening during adhesive curing to maintain consistent joint widths - Wooden furniture and panel work: verify groove and joint opening during assembly for precise alignment - Quality control in manufacturing: log and verify joint dimensions on production lines to ensure consistent performance 6. What you get - A robust joint monitoring device featuring a transparent top plate, two plates, a thin wire pointer, and an easy to use protocol sheet - Accurate measurements supported by the XY scale and scale wire for fine readings - Durable construction from ABS and acrylic materials for long lasting performance