The Kiwis call it "The Brotherhood" and they see it as their secret weapon heading into tomorrow's World Cup final against the Kangaroos.
While the Aussies have been continually forced to quash rumours of a rift in the camp that has come as a direct result of their State of Origin rivalry, New Zealand have maintained all tournament that their greatest strength is their bond to each other.
"Some guys haven't been in the camp for a few years and they feel like they have only been out of the camp for a few weeks or a few months," tough prop Jared Waerea-Hargreaves explained.
"We call it 'The Brotherhood'.
"The culture around the New Zealand Kiwis is just incredible.