Features: 1. Can be fixed on wood and masonry wall surfaces; safety lock helps prevent accidental injury. 2. High-quality nylon thread is easy to identify, wear-resistant, durable, and not easy to break. 3. Adjustable length for different construction applications. 4. High-quality carbon steel hammer provides stable performance. 5. Strong magnet on the side allows easy attachment to iron objects. 6. Suitable for building lines and wall vertical measurements. Specification: Condition: New Item Type: Wire Plumb Bob Applicable Length: 3 meters / 9.8 ft, 6 meters / 19.7 ft (optional) Usage: Suitable for building lines and wall vertical measurements Package List: 1 x Line Hammer Note: 1. Please allow slight variation due to manual measurement. 2. Monitors may display colors differently; actual product color may vary slightly from images.