Bob Size: 1-3/8" Wide X 5" LongWeight: 12 oz.Material: Solid BrassCord Length: 10'Made Of Machined, Fully Polished And Lacquered Solid BrassDetermines The Vertical (Or Plumb) Line From The Point Of Suspension To A Point On The GroundPreferred By Masonry, Carpentry And Surveying ProfessionalsSelf-Centered Cap Simplifies Cord ReplacementComes With 1 Replaceable Hardened Steel PointUse For Installing Deck posts, Support Beams, Plumbing And WallpaperingFor Transferring And Lining Up Points In SurveyingFor Determining True Vertical In Construction