At first glance, Brotherhood of Grace seems like an odd collection of people for a hard rock band. Singer Adrienne Cowan and drummer Steve Finn are both talented Berklee students. Cowan is a thin female who wears mostly black, and usually has on a studded belt. Finn, a male, looks like your typical scruffy college student. The bassist and guitarist are brothers Sam and Max Finkelstein, who are 11 and 13. Sam still has braces.

“If you’re really into music and you see two little kids get up on stage, at first you’re thinking, ‘this is going to suck,’” said the brothers’ dad, Matt Finkelstein. “And then they start playing and you’re like ‘Whoa. That’s insane I can’t believe that.’”

The band as a whole are all extremely talented, clearly all well-versed in technique and composition. Each musician has chops, and, if blindfolded, you could never tell that Sam and Max are in elementary and middle school. Cowan says the age difference has never been an issue.

“I forget they’re younger. It’s really cool. The audiences are all super receptive. They’re like ‘whoa there’s a kid that can totally shred,’” said Cowan. “They’re very mature as well, so it’s not weird at all. They’re super professional and it’s great. I enjoy it. “

Finn has a similar experience.

“I’m 21, Sam’s 11, Max is 13. You’d think with that age gap there would be [a divide] but there really is not. They’re pretty much on par with kids my age,” said Finn.

Brotherhood’s current lineup came together relatively recently. Finn joined the group last year. The Finkelsteins asked him to join after they had seen Finn perform with his dad John Finn, a Berklee professor, at several open mic events. Cowan joined even more recently, after being referred by a band mate of another project.

The band’s name, however, stems from a prior incarnation of the band.

“Our old singer, her name was Grace, and me and Max would be the brotherhood. But Grace was cool because it wasn’t just around the singer. It had more than one meaning. So it kind of worked out cool with the logo too,” said Sam.

Brotherhood’s sound is a mix of hard rock, progressive metal and blues.

“We do a lot of covers. We’re working on some originals … it’s a little bit metal-y and sort of progressive. I mean the kids are really big Dream Theatre fans. We’re doing a lot of bluesy stuff as well,” said Cowan.

The brothers and Finn all listed Dream Theatre as one of their all time favorites.

“Steve actually turned me on to metal shortly after he joined. So I think it was around August that I started to really get into the whole metal stuff. I think that’s really cool because I’m starting to write music now and I can kind of incorporate that into the new music that we’ll eventually start to play live,” said Sam.

For the two brothers, music is a consuming activity. Their skill comes from hours of practice.

“I practice a lot, ‘cause if I didn’t I would kind of start to lose it. Like I practice for about three hours every day. I come home, do homework, and then just practice,” said Sam. “I mean, I think the days that I don’t practice are when I’m on vacation, but I’ll practice like an hour and a half.”

Sam uses his iPad, headphones and an app called JamUp Pro to practice when he isn’t home. Max’s regimen is a little lighter.

“I practice as much as I can. I love doing it. It’s really rewarding and it’s so much fun. Not as much as [my brother], he’s ridiculous,” said Max.