In that case. Go to the dealer, get the locks taken off as you don't want to have a flat in the boonies with a locked tire you can't get off. Then decide if they're really worth it. Unless they're nice aftermarket wheels, I would guess no. The rack tool can be bought on-line. Try
www.xterraparts.com or you could always go to Napa and see if they have the right size Torx tool. The manual is online at
www.nissan-usa.com. and I think also at
www.xterraparts.com.