From Pathfinder Society Scenario #2-13: A Gilded Test, which isn't enabled.

Mechanical Jaws (3-4)

HAZARD 2

MECHANICAL TRAP

Stealth +8 (trained)

Description Mechanical jaws bolted to the stone beneath a camouflaged floor tile.

Disable DC 16 Thievery (trained) on the jaw mechanism.

AC 18; Fort +11, Ref +3

Hardness 8, HP 32 (BT 16); Immunities precision, critical hits

Jaws

Trigger A creature walks on the tile.

Effect The jaws of the trap snap shut, Striking the triggering creature. The triggering creature is Immobilized until the trap is disabled or a creature succeeds at a Athletics check to Force it Open. A creature who critically fails the check to Force it Open instead tightens the trap, dealing 2d6+6 piercing damage to the immobilized creature.

Melee Jaws +14, Damage 2d6+6 piercing

Pathfinder Society Scenario #2-13: A Gilded TestOGL