Datadagger
From Wookieepedia, the Star Wars wiki.
Datadaggers were personal weapons seen among the gentry of Chandrila.
Each dagger was typically an elaborate and decorative 20-centimeter long code cylinder, capable of interfacing with datapads, computer terminals, and doors. Hidden in the plug-in socket was a needle-sharp blade. Twisting the hilt extended the dagger. Datadaggers were almost never detected by standard weapons scans because the blade was carefully nestled among the delicate electronics. Some of the more finely made daggers were family heirlooms passed on through the generations.
