820-0130 is used for random positioning on an optical table when these elements can not be directly fastened to the optical table in required place.
The Rod or Rod Holder are positioned by screwing up to the base plate clamp threaded screw and located after that on the position required. After that the rotary clamp can be rotated around up to 360° for location on the clamp’s slot over a taped hole in the convenient position. Tightening the screw provides sufficient force for holding Rod or Rod Holders stable.
Material: steel with chemical black finish.