Made from solid steel to provide a low center of gravity and great weight in proportion to their short length and small diameter. Each bob is furnished with a strong, braided 8' nylon line which can be conveniently wound around a recess at the top of the bob. Perfect Precision - The Starrett's best 5 oz. steel plumb bob is used to achieve precise accuracy in all layout work, construction, and surveying. Starrett tools exceed performance requirements of national and international standards. Secures into Place - The Starrett Plumb Bob comes with a sure grip knurling on a polished steel body for easy handling. It is a hardened and ground removable point for greater accuracy, longer life, and hexagonal-shaped head that prevents rolling. Impressive Weight Proportion - Ideal for precision work in construction, the Solid steel construction 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 - Manufacturing quality tools that provide consistent and reliable performance since 1880, Starrett's commitment to product excellence, has earned them a reputation as one of the most trusted names in the industry.