Torx #10 and a flathead screwdriver wide enough to span the gap and thin enough to fit in the slot.
No special tools, spanners, do-hickeys, flim-flams, or doo-dads needed. I also found I needed to apply loc-tite to keep the pivot from loosening on my PT. But unlike the SnG and SmF, the PT does not come from the factory with loc-tite already applied.
Nice knife, huh!?! Enjoy it.