Jawbreaker ShieldArmor 12
Source Pathfinder #154: Siege of the Dinosaurs
Hit points 48 (Hardness 12, BT 24)
Type Shield
Price 1,650 gp
Weight 1 bulk
This heavy bone shield is composed of a massive plate of dinosaur bone with jagged, tooth-like ridges ringing its edge. It has Hardness 12, HP 48, and BT 24. The ridges are unremovable +1 striking shield spikes that deal slashing damage instead of piercing damage.
While holding the jawbreaker shield, you gain a +3 item bonus to your Reflex DC to resist Swallow Whole attacks.
Activate 
Interact
Trigger A creature attacks you with a jaws or fangs Strike or similar Strike using its mouth
Effect You make a shield bash Strike as a reaction against the attacker. If the shield bash hits, the target takes damage and must attempt a DC 31 Fortitude saving throw. The effects of the saving throw are determined after the effects of the triggering Strike are resolved.
Success The target is unaffected.
Failure You wound the target's mouth. It takes 1d6 Persistent Bleed Damage and takes a -2 status penalty to attack and damage rolls with jaws, fangs, or similar Strikes for 24 hours.
Critical Failure You break the target's jaw. As failure, and the creature can't make Strikes using its mouth for 1 minute. At the end of its turn, it can attempt a Fortitude save to regain the ability to make Strikes using its mouth.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
AbjurationEffects and magic items with this trait are associated with the abjuration school of magic, typically involving protection or wards.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.