Thrombash

Thrombash: This fearsome weapon features two wicked, hooked blades facing in opposite directions at the end, and a third blade jutting at an angle near the hilt. A thrombash is an exotic ranged weapon; it can be up to 30 inches long and is awkward to throw without special training. A character can use a thrombash in melee as a martial weapon.
Exotic One-Handed Thrown Weapon or Martial One-Handed Melee Weapon
Cost: 200 gp
Dmg (S) 1d4 Dmg (M) 1d6 Dmg (L) 1d8
Critical: x3
Range Increment:
Weight: 3 lb
Damage Type:Piercing or Slashing

Source: Sandstorm