A Delgorian locking mechanism was a sophisticated lock. In 2370, Verad's mercenary T'Kar forced Odo to shapeshift into a box that was sealed with a Delgorian locking mechanism. Later, Quark was able to remove the lock with a laser scalpel as he knew where the Delgorian locking mechanism was vulnerable. (DS9: "Invasive Procedures") According to StarTrek.com, this locking mechanism was manufactured on the planet Delgoria.