Takedown Pivot PIN Master Tool set DuoTool 308 7.62 and 223 556 6.8 SPC 300 AAC Compact tool makes the tricky process of installing the pivot pin fast and easy No more accidentally launching the spring and detent across the room while installing the pivot pin Machined from T6 aluminum, A must have for every builders tool bench Two piece set works with all calibers 308 and 223 556 Allow easy insertion of the pivot pin detent spring and detent