Plumb bobs helped build the pyramids. Swanson"s precision accurate, premium brass plumb bobs are constructed of solid spun brass for heft and durability. The replaceable hardened steel tips maintain accuracy throughout the ages. Features: * Solid brass * Hardened steel tip * Includes 2 replacement tips * Professional grade What"s In The Box: * Swanson PB008B 8 oz. Brass Plumb Bob