Edinburgh trio David Denton, Stuart McInally and Steven Turnbull have all signed new deals that will keep them at Murrayfield until 2014.
"I'm delighted that we've retained the services of these three big, dynamic, physical forwards," said head coach Michael Bradley.
"All three have Edinburgh Rugby in their hearts.
"They want the club to develop and win trophies and that's a key ingredient for me."
Flanker Denton, 21, made his Scotland debut in the World Cup warm-up Test against Ireland but did not make the final party for New Zealand.
McInally is also 21 and the number eight is the most capped Scotland Under-20 player in history.
Turnbull, 24, has been full-time at the club since 2008 and the lock has been a regular starter for Bradley this season.
"Securing these players gives us more long-term stability which is very important at a club that wants to compete at the highest level," added the head coach.
"But that stability has to come from players who have quality and we believe that these players have those qualities to drive the club forward."