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From Pathfinder #151: The Show Must Go On, which isn't enabled.

Poi

ITEM 0
UNCOMMONAGILEBACKSWINGFINESSENONLETHAL
Price 2 sp
Usage held in 1 hand
Bulk L
Category simple
Group flail
Damage 1d4 bludgeoning

Poi are light weights tethered to ropes or chains. Performers swing the weights, usually one in each hand, in rhythmic patterns.

Pathfinder #151: The Show Must Go OnOGL