Quarterstaff +2

Quarter Staff +2 is an enchanted weapon. It can deal 1d6 +2 points of damage, has -2 THACo bonus, a speed factor of 2 and it weighs 3lbs. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

It's sold at the Adventurer's Mart, at the Tankard Tree and by Karthis al-Hezzar.

In-game description
"Quarter Staff +2 The simplest of staff weapons is the quarterstaff, a length of wood six to nine feet in length. High quality quarterstaves are made of stout oak and are shod with metal at both ends. Powerful enchantments during the making of this staff have improved its accuracy and the damage it can cause, but they bear no signature."