What is a plumb-bob?

     
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A plumb-bob (sometimes called a "plumb-line" or "plummet") consists of a specially-balanced symmetrical weight, typically with a narrow or pointed tip, which is attached to and suspended from a string to create a vertical reference line.

 
     
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Once the plumb-bob is suspended, the laws of gravity will act upon it to create a perfectly vertical line that has lots of practical applications such as transferring points, being used as a guideline, or marking lines prior to any building work or cutting.

 
     
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There are typical plumb-bobs such as the traditional type and others with additional features such as plumb-bobs with magnetic strips or retractable pins, each have specific features which aid them in a variety of tasks.

 
   Plumb bob, marking out tools, plumb line, wonkee donkee tools DIY guide, how to use a plumb bob  
     
   What are the different types of plumb-bob? 
     
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