Stihl 1/4p pitch chain is .45 depth gauge clearance
Stihl 3/4p pitch chain is .65 depth gauge clearance.
Stihl regular .325 pitch chain is .65 dg clearance
So if that .325 mini is .65 dg clearance, then your 3/8p two in one file kit should work as it's indicated they take the same size file...