In-N-Out Burger’s “family band” rocked The Wiltern last weekend in a concert to combat substance abuse.

The band, named .48 Special, opened for punk band The Offspring during the annual concert called Rock 2 Freedom, which benefits Slave 2 Nothing, a non-profit organization set up by In-N-Out owner and president Lynsi Snyder and her husband Sean Ellingson.

This year’s edition sold out with more than 1,900 attending. It raised $978,856 for the cause, according to representatives.

This is the second year .48 Special has played a historic Los Angeles venue. Last year, Rock 2 Freedom took place at the Hollywood Palladium on Sunset Boulevard in Hollywood. The Wiltern is a 1931 Art Deco movie palace transformed into a concert venue.

In-N-Out’s band is named for the year Snyder’s grandparents founded the drive-thru chain, 1948. Its members include Snyder and her colleagues. They performed 17 songs in the first half of the show. The set list included rock, metal and grunge covers such as “Fight for Your Right to Party” and “Smells Like Teen Spirit.” It opened with “Blind” and ended with “I’m Your Boogie Man.”

.48 Special put on a flashy show including pyrotechnics and aerial stunts.

The Offspring also did several songs, including “Come Out and Play” and “Gotta Get Away.” The band closed with “Self Esteem” from its 1994 breakout album “Smash.”

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The concert marked Slave 2 Nothing’s 10th anniversary. It was presented in partnership with Audacy’s KROQ and hosted by KROQ personality Megan Holiday.

It included a raffle and benefit auction. In keeping with the cause, mocktails were served.

Slave 2 Nothing focuses on combating substance abuse and human trafficking. October is National Substance Abuse Prevention Month, and In-N-Out is inviting its customers to round up their purchases, matching gifts three-to-one up to $300,000 through the end of the month.

Slave 2 Nothing also puts on a car show called Cruisin’ 2 Freedom in January in support of Human Trafficking Prevention Month. Last year’s event was in Redondo Beach.

With its car culture and major events such as the FIFA World Cup, California has some of the highest numbers of human trafficking cases, according to experts such as the National Sexual Violence Resource Center.

In-N-Out is based in Irvine and Baldwin Park, its hometown, but opened an “eastern headquarters” in the suburbs of Nashville this week, days after the chain’s 78th anniversary, according to The Tennessean. Snyder has said she plans to move there with her family.

Information: slave2nothing.org