Never checked back here to report....got my tool and had to actually file down the blade tip to thicken it as the cockj aw screw slot was thicker then the end of the tool driver blade, so I filed it some to fatten/thicken it to fit...
The pointy end fits nicely into the hole in the cock jaw head and once it's as tight as I can twist it with the screw driver, I inserted the pointy part and got another "TWEAK" tighter...
Fine took...serves well as even an "On gun" knapping tool to sharpen the flint...