The Surveyors 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.
Automatically rewinds when not in use. Save time with setting up your tripod and instrument.
Pull the string out as much as you need, slip over your plumb-bob and then retract the length as needed depending on the height of your tripod. Eliminates tangled, broken and muddy string, no knots needed. 3.6m length
Picture shown with Plumb Bob (not included)