Introducing the Harden Supper Magnetism Plumb Bob (6M x 400G), a professional tool designed for precise measurements in construction work. Made of carbon steel and ABS, this magnetic bob is ideal for measuring vertical surfaces and serves as an appendix to theodolite and total station in surveying work. The flexible tip allows for easy handling, and the retractable feature adds convenience when not in use. This tool is perfect for construction and surveying work, providing accurate measurements and easy handling. .