Props Aidan Ross and Angus Ta'avao have re-signed in a Super Rugby front-row boost for the Chiefs.
Ta'avao has signed through to 2020 while Ross has extended his contract until 2021.
Ross began his Super Rugby career this season after making his debut in 2017 as a squad replacement player, but had his season curtailed after seven games by an ankle injury.
He has played for New Zealand under-20 and was also in the squad for the New Zealand Provincial Barbarians game against the Lions in 2017.
Ta'avao came in to the team as a squad replacement player this season, playing 17 games after previously having appeared for the Blues and Waratahs.
Another prop, All Blacks and North Harbour front-rower Karl Tu'inukuafe, has signed on at the Blues for the next three years after turning out for the Chiefs this season.
All Blacks coach Steve Hansen said Tu'inukuafe's recommitment to New Zealand Rugby was fantastic news.
"Big Karl really impressed us in his first campaign with the All Blacks in June," Hansen said.
"He's a humble man and very low-key, but he went about his work in a very professional manner. We all saw how destructive he can be as a scrummager but he's also nailing his other core roles, he's eager to learn and he made great strides in the black jersey."