Bo Staff

Cost: 1 gp
Weight: 3 lbs.
Damage: 1d4/1d4 (small), 1d6/1d6 (medium)
Critical: x2
Range: —
Type: Bashing
Category: Two-Handed Melee Weapons
Proficiency: Exotic
Weapon Groups Double, Monk
Special: Blocking, Double, Monk

Similar to a quarterstaff, only more slender and tapered at one end, the bo staff is both a defensive device and a weapon.