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.