A few Aussies around here. Not many Kiwis. Thankfully you both speak (almost) the same language !
I learned a new Aussie term the other day. An adjustable wrench (spanner for you English blokes), which is commonly call a Cresent wrench (after one of the major manufacturers) is sometime also called a "farmer fitsall" (for obvious reasons).
Down under it is called a "nut fucker" ! Probably more accurate than "farmer fitsall" !