Salvaging tools and electrical kits both let you obtain special items from some encounters and opponents.
In addition to the uses below, salvaging tools let you Salvage (break down) items in your inventory.
In addition to the uses below, electrical kit lets you craft Electronics.
They are otherwise identical in use (Kinak has confirmed on a podcast).
Encounters
Southside: Abandoned Building: Pool Of Water - allows you to pass.
Southside: Buried Lab: Cabled Hall - salvage some electronics.
Southside: Buried Lab: Southside Lab Office - salvage some electronics.
Southside: Buried Lab: Cell Block - camera security bypass.
The Docks: Abandoned Subway: Antiquated Monitors - salvage some electronics.
The Docks: Midgard Warehouse: Catburgling On The Catwalk - door bypass.
Metroplex U: Computer Lab: Open Workstation - salvage some electronics.
Outside The Slags: Midgard Bioresearch: Empty Breakroom - gain cordless coffee pot.
Outside The Slags: Midgard Bioresearch: Testing Lab - salvage some electronics, 20 Red Alert.
The Slags: Midgard Laboratory: Lab Terminal - salvage some electronics.
Oldtown: Construction Site: Powered-Down Drone - salvage some electronics.
Oldtown: Construction Site: Dig Doug Down - salvage some electronics/materials.
Oldtown: Records Vault: Sleeping Vault Terminal - salvage some electronics.
Under Downtown: The Cellar Door: Cellar Door Bouncer - warning message.
Under Downtown: The Cellar Door: Yakuza At the Bar - starts quest.
Halloween 2011: Basement Ballroom (2011): Empty Stage 2011 - add various electronics.
Halloween 2013: Beneath The Dorms: Broken Lab - patch it up.
Halloween 2015: Party Floor (setup): Dark Cubicles - unlock Disconnected Camera encounter.
Downtown: Electric Room Door encounter: Dismantle it
Opponents
Allows you to get special items from electric and cyberware-enhanced opponents. Unique items are in bold.