The Bruins have received 13 points (seven goals, six assists) in 17 games from the four players who have been on their fourth line the most in the playoffs -- Kuraly, Joakim Nordstrom, Noel Acciari and Chris Wagner.
"It's called depth, right?" Babcock said. "That's how you beat the other teams. You need good goaltending, real good 'D' and you've got to be good down the middle. They have that."
They also have experience with Bergeron, Krejci, left wing Brad Marchand, defenseman Zdeno Chara and Rask the five remaining players from Boston's Stanley Cup championship in 2011.
Chara (175), Bergeron (129), Krejci (125) and Marchand (101) are four of the 43 skaters still in the NHL who have appeared in at least 100 playoff games in their career. Rask (82) is seventh among active goalies in games played.
"They're big-time leaders, they dig in and when the big games come, they find a way to do whatever they have to do," Babcock said. "If it's play defense against you, they do it. If it's score against you, they do it. They've been impressive."
The Bruins' ability to use their experience was one of the biggest factors in their six-game series win against the Columbus Blue Jackets in the second round.