Gear's Rule

Gear's RuleBracers
Flavor text	Holding the form of a mechanical scorpion, this object is really a cluster of autonomous nanites – extracts of the soul and abilities of the android Gears, combined with portions of his familiar. When placed on a character's wrist this item merges with the characters flesh, appearing as a faintly glowing tattoo and granting several abilities to its owner.
Effects	The nanites inside the item provide the wearer with multiple abilities Fermela: Owner gets +1 bonus to all attack rolls with bombs. This bonus increases to +2 at level 12. Hope: Owner gains a +2 bonus to saving throws against mind-affecting, death, paralysis, disease, stun, and poison effects and resists Fatigue for 8 hours past the usual limit. At level 20 the owner becomes immune to Fatigue and Exhaustion. Catalyst: Owner's bombs deal additional dice of damage as if they were an alchemist 2 levels higher; the owners save DCs are increased by 1. Focusing Surge: Once per day as a free action, the owner can activate the nanites inside the item for 5 rounds, gaining fast healing (5), as well as immunity to poison, death effects, paralysis, stun, disease, and the effects of Targeted Bomb Admixture extract. At level 16 the duration of Focusing Surge increases to 10 rounds.
2 lbs.
Sell: 20000 Buy: 80000
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GearsRuleItem (c76341cfbc0d0f14ea51ceb30efee432)

Gear's Rule is a magic Bracers in Pathfinder: Kingmaker.

Needs confirmation that Targeted Bomb Admixture effect from it doesn't work. (Last Version:2.1.7b) (Kingmaker)

Source

Found in a chest in the Technic League Hideout during Octavia and Regongar companion quest Cruel Justice.