Josh Turnbull is determined to push for further international honours after his move to the Blues from Scarlets.
The 26-year-old Wales international moved to Cardiff after coaching staff assured him he would be picked mainly at blindside flanker.
Turnbull believes Racing Metro's Dan Lydiate is ahead of him in the pecking order, but wants to specialise at number six.
"If I can do that I can push for further honours," he said.
Turnbull has made seven appearances for Wales, and impressed as an openside in the 31-30 defeat by South Africa in the second Test in June 2014.
He was given the number seven shirt in the absence of British and Irish Lions opensides Sam Warburton and Justin Tipuric, but does not believe he will be considered ahead of either of them if they are fit.
"It was a little bit of emergency duty at seven," said Turnbull.
"I want to push on at six now and put pressure on the guys who are playing in that position.
"And that comes down to playing week in week out and playing well."
The chance to play regularly at blindside was Turnbull's motivation for leaving the Scarlets.
"What weighed on my mind the most was that I was playing in several different positions down the Scarlets, I wasn't getting regular game time in one position and that's what I wanted.
"When I spoke to Simon [Easterby - then Scarlets coach] about that he couldn't guarantee me that.
"When I came to speak to the Blues they were keen to get a blindside flanker who can cover other positions but first and foremost to do a job at six, and that's what I want to do."