* Cone tool must be protected during the entire life. To protect the cone should always keep the nozzle on it.
* Proper use and storage of the expansion tool ensures its long-term operation. Before storing tools necessary to reduce an extension nozzle, turning it a few turns. Knobs of the expander should be kept together. Only after this tool can be placed in a protective case.
* Note about whether the expansion nozzle tool is weakened, and in preparing the instrument to work, it must be screwed.
The control accuracy of the tool
When testing tool should:
* Measure the diameter of the segments in the extended position (handles brought together), and then compare it with the tabulated data in the accompanying instructions.
* Fully open the handle tool and check whether all segments of the expander head are in contact with each other and are in the same plane. Then bring hands together and check the uniformity of the disclosure of segments.