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The holding rod is a metal rod for easy grounding of the experimenter during electrostatic experiments.
The rod is provided with a 4 mm bore through which an experiment cable can be connected, which is also connected to a ground connection (PE).
In electrostatics experiments with the electrometer (item no. 1001025 or 1001024), the rod is also used to discharge the Faraday cup (item no. 1000972).