Universal Plumb Bob Setter With Commercial Grade 14 oz. BobSetting Pin Punches Into Wood Or Drywall Surfaces And Disengages With A Simple Twist And Retracts Into The Case Automatically, Strong Magnet For Steel FramesAdjustable Hook Ratchets To Cinch Onto Beams Or Hook Onto Nails Or StudsBraided Nylon Line Extends And Holds At Lengths Up To 14-1/2', Retracts Into Case AutomaticallyInternal "Flush Pin" For Zero Distance Measurements With Plumb Line Flush With SurfaceUnique Plumb Bob Features A Quick Stabilizing Cap That Reduces Bob Wobble And SpinBob Also Features Embedded Elastomer Side Bumpers And A Thick Tip GuardThe Top Of The Plumb Line Is Always Preset At 2" Distance From The Surface So The Only Measurement Needed Is Down At The Bob