A scomp link was an accessory that allowed an astromech droid or BD unit to plug into a computer via a socket. Also, Imperial droids such as the KX-series security droid had one. It consisted of an extendable arm with a rotating tip. The clone trooper CT-1409 "Echo" had his right arm replaced with a scomp link by the Techno Union after sustaining heavy injuries from experimentation. The Kaminoan-affiliated AZ-series surgical assistant droids also possessed scomp links, embedded into their collapsible arms. Scomp links could also be used manually as an independent tool; Ezra Bridger utilized an old R-series scomp link as a lockpick in order to manually gain access to doors, though this process could take time and skill depending on the door's security.