I moved this to the originality section for you.
The screwdriver was only included with cars having the RPO N96 (simulated mag wheel covers) or the RPO P02 (simulated wire wheel covers) option. It was a flat blade screw driver used to remove the wheel covers, as the lug wrench had a tendancy to put dings and dents in them. Not sure about the usage in the Camaro, and research is still being done, but it appears it may have never reached production on the Corvette. More info on that HERE
, starting on page 3.