From Pathfinder Lost Omens High Seas, which isn't enabled.

Sawtooth Grapple

FEAT 8

Activity 2 actions

Prerequisites trained in sawtooth sabers

Requirements You're wielding two weapons, at least one of which is a sawtooth saber.

Your sawtooth saber training enables you to pin down an enemy using your twin blades. Make a Strike with each weapon against the same creature. If you deal sneak attack damage, you can immediately attempt to Grapple the creature, even if you don't have a hand free. If you dealt damage with both Strikes, your multiple attack penalty is not applied to the Grapple attempt.

Pathfinder Lost Omens High SeasORC