I don't know where I got this tool but was wondering; Did S&W ever include this tool with their guns?
From the SCS&W- 1988-1991 flat steel 4 bladed tool for a keychain
1991 onwards flat steel 2 bladed tool for a keychain
There are two styles of the flat (key chain) SAT.. Large hole like yours and , small hole is the other style...
JIM................
Numerich has them for $11.50 new.