Pursuant to California Assembly Bill 1263, we no longer ship firearm parts, accessories, or tooling to the state of California.
These are what I believe to be a Winchester screw studs - 1 is dovetailed and 2 are for swivel studs and go into the stock barrel channel.
All parts sold must be checked, installed, and assembled by a
qualified and competent gunsmith as some components may or may not require
fitting depending on the tolerances allowed by the manufacturer, vintage, and
potential re-manufacturer (if an aftermarket piece).