The Starrett Solid Brass Plumb Bob is corrosion resistant and is used to achieve precise accuracy in all layout work, construction, and surveying. Conforms to US Government specifications GGG-P-501e. The Starrett Plumb Bob comes with easy, self-centering line assembly with screw cap design and points are easily replaced if worn or broken. Ideal for precision work in construction, the Solid brass plumb bob provides a low center of gravity and great weight in proportion to its short length and small diameter. Used in a wide variety of industries as an essential part of metalworking and woodworking, Starrett tools can be used in various applications and offers unparalleled service with execution like no other. Manufacturing long-lasting and easy-to-use tools that provide consistent and reliable performance since 1880, Starrett tools are made with the highest standard of quality and workmanship, manufacturing more than 5,000 various tools, gages, and instruments, providing fine precision tools for industrial, professional, and consumer markets worldwide. Precise Accuracy - The Starrett 16 oz. steel plumb bob is corrosion resistant and is used to achieve precise accuracy in all layout work, construction, and surveying. Conforms to US Government specifications GGG-P-501e. Convenient - The Starrett Plumb Bob comes with easy, self-centering line assembly with screw cap design and points are easily replaced if worn or broken. Impressive Weight Proportion - Ideal for precision work in construction, the Solid brass plumb bob provides a low center of gravity and great weight in proportion to its short length and small diameter. Easy to Use - Incorporating convenience and excellence, Starrett tools are designed to be user-friendly. Whether you're an experienced professional or an amateur when it comes to home improvement, our tools are handy and accessible. The Standard for Excellence - Proudly made in the USA, Starrett combines over 140 years of American heritage and innovation with globally sourced materials to deliver exceptional quality tools and products.