Williams experience crucial for All Blacks
James Mortimer 30 Oct 2012 Getty Images
It appears Sam Whitelock is now recognised as the senior lock in New Zealand Rugby, but the Crusaders second row forward has played plenty of rugby this season so far.
Hansen said choosing the second row forwards had not been an easy decision.
"Obviously there has been a lot of debate about the fourth lock," Hansen said.
"It is a selection the three of us (selectors) spent a lot of time discussing. We came to the same conclusions we came to in June.
They said the fact that Williams was the second most capped All Blacks lock, only behind Ian Jones, that gave him the nod.
"We have a 75 Test veteran," Hansen said.
"Yes he hasn't played a lot of rugby because of injury but we know he has the mental capacity to do the job on the field.
"He brings with him a huge amount of experience and we know he is good at assisting the young guys. Retallick and Romano will benefit from that and hence why he has been selected."
Most popular News:
AIG brings live streaming of All Blacks v USA Test to 127 territories30.Oct.2014
Royal replaces Edmonds on the Maori All Blacks bench01.Nov.2014
Preview: USA v All Blacks01.Nov.2014
New Under 20 training squad named31.Oct.2014
Tickets now $149 for Sevens Wellington31.Oct.2014
All Blacks team named to play historic Test against USA30.Oct.2014