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The 12 Gammon Reel is used to suspend a plumb bob under a surveying instrument. It can also be used to suspend a plumb bob while providing a target to accurately position with a surveying instrument. Use the 12' large Gammon reel as an aid to set up and deploy a clean, accurate plumb. Slip the reel into your palm and draw the bob to desired position and stop with finger pressure. Steel clock spring zips the string back into the case.

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Corporation 11-729 Gammon Reel 12' - Chalk Lines