As linked in this answer, the official Star Wars Databank describes:

Astromech droids are a series of versatile utility robots generally used for the maintenance and repair of starships and related technology. These small droids are often equipped with a variety of tool-tipped appendages that are stowed in recessed compartments. The R2 unit is a popular example of an astromech droid.


What are the tools that have been demonstrated in canon?

  • Does canon include Clone Wars (with that astromech mini-arc) and Rebels and "Chopper"? – user12183 Dec 14 '15 at 20:33
  • I felt that my answer to this one was pretty comprehensive. Is there anything else you think I should address before considering an acceptance? – Valorum Sep 3 '16 at 19:28

The Star Wars Blueprints: The Ultimate Collection book lists the following components available to the R2 Unit

  • Drink Serving Unit (presumably this is not a standard feature but one added by Jabba's men)
  • Fine Manipulator Arm
  • Spacecraft Linkage and Control Arms
  • Universal Computer Interface Arm
  • Utility Saw
  • Multi-function Utility and Interface Arm
  • Lubricant Reservoir (which can be emptied at will)
  • Extendable Auxiliary Visual Imaging System
  • Lifeform Scanner
  • Kerner Optical Holographic Projector
  • Signal Amplifier
  • Fire Extinguisher
  • Inflight Maintenance Grasper Arm
  • Electro-Magnet Power Charge Arm
  • Mechanical Grasper Arm

enter image description here

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  • Does this agree with what is demonstrated in the film (including prequels) ? – ThePopMachine Dec 14 '15 at 19:03
  • Also, your link is no good. – ThePopMachine Dec 14 '15 at 19:04
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    Was this 'extendable neck' demonstrated? – ThePopMachine Dec 14 '15 at 19:13
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    @ThePopMachine - I'm struggling to find any instance where the "extendo-neck" comes into play. By the same token, I can't find anything that disagrees with it. – Valorum Dec 14 '15 at 20:41
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    @ThePopMachine - Looking at the scene where Anakin steals a Naboobian fighter, I can kinda see why they needed to explain how R2 fits into the socket. There's not enough space for his feet. That being said, what an unnecessary attention to detail :-) – Valorum Dec 14 '15 at 21:09

R2-D2 has shown the use of a data prong, a power connection, an oil slick, a grasping claw, a periscope, holo recorder/projector, jets, grappling hook, saws, plasma cutters/soldering iron like tool, and a scanner dish.

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