Bob Size: 7/8" Wide X 4" LongWeight: 8 oz.Material: Zinc Plated SteelCord Length: 10'Determines The Vertical (Or Plumb) Line From The Point Of Suspension To A Point On The GroundUse For Installing Deck posts, Support Beams, Plumbing And WallpaperingFor Transferring And Lining Up Points In SurveyingFor Determining True Vertical In ConstructionHexagonal Body Shape Prevents RollingRemovable Cord Cap For Easy Cord Replacement