Stable: High quality carbon steel hammer with stable performance. There are strong magnets on the side for easy fixation on ferrous objects. Adjustment: Adjustable range for different construction situations. Uses: It can be fixed on wood and masonry walls, and the safety lock can prevent accidental injury. Durable: High-quality nylon thread is easy to identify, wear-resistant and durable, not easy to break. Application: Suitable for vertical measurement of architectural lines and walls. 1. Powerful use: Fast and stable for building a perfect vertical line or plumb bob, stable within 6 seconds. 2. Value and practicality: The plumb bob is retractable - adjustable by resistance, Can adapt to different specifications of the plumb (5oz-16oz), and can ensure fast balance. Just lift the plumb and the line will automatically retract. 3. Flexibility: The plumb bob with cord includes dowel pins for wood/drywall, strong magnets for steel surfaces, and hooks for nails or studs. Locator wrapped in elastic material provides additional drop protection and a secure handle. The freely retractable positioning pin is more secure, When not in use, it can be stowed away to prevent accidental injury. 4. Product Specifications: 14.7ft Universal Magnetic Plumb Setter. Self-retracting wire and 310g plumb bob. 5. Multi-occasion application: wood, drywall, gypsum board, steel surface can be used.