Fighter's ForkWeapon 3
Source Pathfinder Core Rulebook
Damage 1d8 Piercing
Type Martial
Price 50 gp
Weight 1 bulk
This +1 trident, usually engraved with a decorative pattern resembling fish scales, is a common weapon among warriors of aquatic ancestries.
Activate 
Interact
Effect You extend or shorten the trident's haft. When extended, the trident requires two hands to wield and gains the reach trait, but loses the trident's normal thrown trait.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
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.
ThrownYou can throw this weapon as a ranged attack. A thrown weapon adds your Strength modifier to damage just like a melee weapon does. When this trait appears on a melee weapon, it also includes the range increment.
TransmutationEffects and magic items with this trait are associated with the transmutation school of magic, typically changing something's form.