This item stabilizes the endoscope probe, which allows to easily look at high and deep areas. Can be used for the regular probe (single tube) and the 2-camera-system probe (with extension tube).
The probe will be pushed from bottom (with the handle) to top. Then it can be fixed by pushing the longish button down. While doing that turn the red fixing ring onto the longish button. The probe is now stable in the base holder.