Hilt of the Equalizer

Hilt of the Equalizer is one of the three parts required to form The Equalizer, which is a powerful longsword. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition. It can be found on the table near your cell in the Mind Flayer Dungeon located in the Underdark.

In-game description
"A Piece of the Equalizer

This is a part of the Equalizer, a great long sword forged long ago as a tool for balancing the powers of the universe. Also known as the 'sword of neutrality', it did greater damage the further the target's alignment was from True Neutral. The Equalizer was last rumored to have been wielded by the elven hero Alaine Greenleaf, who was lost during a voyage to the Underdark. Other rumors have, however, proposed that the blade's pommel gem was stolen by an escaped slave who returned to the surface world."