Tasman loose forwards Liam Squire and Tevita Koloamatangi have both re-signed with the Chiefs for the next two seasons.
Chiefs coach Dave Rennie said: "They are both quality young men who have impressed both on and off the field. We love their attitude, their work ethic and their contribution to our culture."
Squire has played five games for the Chiefs, making his debut off the bench against the Highlanders in Hamilton in March.
"At this stage of my career I feel for the best development of my rugby, this is the best place for me to be," the 23-year-old said.
Koloamatangi made his Super Rugby debut against the Crusaders in February and has played three matches for the defending champions.