Odd-looking Key

Odd Looking Key is needed in Durlag's Tower to open the cabinet which can't be lockpicked. Inside there, the Switch for an Engine can be found, which is needed to activate the steam engine. The key itself can be found somewhere on the second underground floor itself. This item appears in Baldur's Gate: Tales of the Sword Coast and Baldur's Gate: Enhanced Edition.

In-game description
"A bejeweled key of odd design."