The tool is designed for the easy removal of the orifice or hard seat in the Scubapro MK17, MK11 and MK19 Evo first stages by inserting the stainless steel rod from the diaphragm side and then  pushing the high pressure orifice out. 

The seat extractor is made from stainless steel and Acetal

The tool can be used in conjunction with Scuba Clinic's drift tool for Scubapro diaphragm first stage for orifice installation.

Regulator is not included.