Sonic screwdriver
A sonic screwdriver is a multi-function tool of Time Lord origin. Several such devices have been employed by the Doctor during his travels.
Known Functions
- Tightening and loosening screws
- Unlocking and locking doors (they are apparently particularly good at this)
- Cutting various materials (requires the sonic screwdriver to be in direct contact with the material)
- Assorted sensor functions
- Hacking electronics
- Interfering with almost any other technology
Limitations
- It's rubbish on wood.
- It can't open "dead-locked" doors.