Well in my case it apparently wasn't a waste of time. All the images of the icetoolz wrench I found were of the screwdriver type. I did find this:
"lifeline" brand tool - is that what you mean? Looks good...
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1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"