baling wire

[LekoBoy]

Soft iron wire often used for temporary or quick mechanical repairs. Also used to mouse a shackle or turnbuckle.

http://clunkbucket.com/baling-wire-bonanza/

Alternatively spelled as "bailing wire," although definitive-word-on-all-things Wikipedia says:

Spelling note: "Baling wire" is sometimes misspelled as "bailing" wire, but "bailing" usually refers to a leak or flood, as in "bailing" out a leaky rowboat with a pail, or bailing out a bank with funds to keep it afloat.