From Pathfinder #158: Sixty Feet Under, which isn't enabled.

Iron Maiden Trap

HAZARD 8

Stealth +20 (expert)

Description A pressure plate hidden on the floor before an iron maiden causes the torture device to snap shut and trap the triggering creature inside.

Disable DC 28 Thievery to disable the pressure plate

AC 25

Hardness 6, HP 24 (BT 12) Iron Maiden Hardness 12; Iron Maiden HP 46 (BT 23); Immunities precision, critical hits

Slam Shut

Trigger A creature steps onto the trap's pressure plate (indicated on the map)

Effect The front of the iron maiden slams shut with incredible force and locks itself. The triggering creature takes 4d10+10 piercing damage and 2d6 persistent bleed damage (DC 26 basic Reflex save; if the creature critically succeeds, they avoid the trap completely). The triggering creature is also Immobilized. The victim can end their immobilization only once a creature outside the iron maiden unlocks the device (requiring two successful DC 28 Thievery checks to Disable a Device) or breaks the iron maiden, after which the trapped creature must succeed at a DC 25 check to Escape the trap's spike-lined interior.

Reset The pressure plate must be reset manually.

Pathfinder #158: Sixty Feet UnderOGL