Sonic screwdriver

The sonic screwdriver is a fictional tool in the British science fiction television series Doctor Who. Its most common function is to operate virtually any lock, mechanical or electronic, and thus open doors for escape or exploration. It has also been used for repairing equipment, as an offensive weapon, and occasionally even to drive screws. Like the TARDIS, it has become one of the icons of the programme, and is closely associated with the Doctor.
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