Features: Ensures precise vertical alignment with magnetic plumb Cord and auto retractable 10ft nylon line, featuring steel frame magnets for metal surfaces adhesion. Built with aluminum bronze construction and ribbed eyelet for nails/studs anchoring, this commercial grade plumb Cord tool integrates a flush pin mechanism for measurement accuracy. Ideal for carpenters, construction workers, and DIYer enthusiasts requiring reliabled vertical/horizontal references in metal rich environments like steel frameworks or installations. Optimize efficiency at job sites for wall alignment, ceiling leveling, or structural inspections where quick stabilizing design minimizes swaying and ensures measurement consistency. Combines durability with ergonomic portability, offering waterproof housing and auto rewind functionality to withstand harsh worksite conditions while maintaining precise. Specifications: Line length: 3/6 meters Component: plastic + metal Package Includes: 1 Set Ergonomic Plumb Line note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.