PLUMB BOB: This plumb bob is used by foundation contractors; excavation contractors and surveyors for lining up; transferring points or establishing a straight vertical or plumb line by connecting it with a string. PRACTICAL DESIGN: The plump bob tool has a practical design with a hardened steel tip to ensure accurate measurements. It also improves the work quality along with maximum efficiency and safety. QUALITY MATERIAL: This steel tip plumb bob features a brass-plated body that adds to its durability and great performance. It also has a lacquer finish; which protects it against corrosion while adding to the lifespan. EASY INSTALLATION: The brass plumb bob tool has a hardened steel tip and cap that can be removed and replaced easily to offer a quick installation of a string or line. PRODUCT SPECIFICATION: Johnson steel plumb bob weighs 16 oz. and is ideal for a variety of indoor and outdoor applications; including carpentry; masonry; surveying and fencing.