A locking activator (alternatively called blade lock) was a specialized activation stud located on the hilt of a lightsaber that could lock the weapon's blade into the activated position, even when the wielder was not holding the lightsaber. It was also used by wielders who frequently used their lightsabers as a thrown weapon. The locking of the blade prevented it from being accidentally deactivated when the weapon impacted the target.
The locking activator was utilized by Jax Pavan in 18.8 BBY during his encounter with Xizor. Aurra Sing's lightsaber also had this device.
- Jedi Academy Training Manual