These screws
are designed specifically for Nill Grips and will not work with
factory or most other 3rd party grips. Nill provides screws with
all their grips in which the factory screws do not fit, so it is not necessary
to order Nill screws unless you need an extra set to replace
lost or damaged ones.
Nill Screws for Sig Sauer
P220 / P225 Blue Slotted (Set of 4)