Metallica frontman James Hetfield has teamed up with Ernie Ball to create his own line of signature guitar strings.

Dubbed Papa Het's Hardwired Master Core, the strings come in a unique 11-50 gauge combo, which Ernie Ball calls "ideal for [Hetfield's] aggressive style and technique."

"It's only taken 40 years for me to have my own strings!" Hetfield laughs in a video making the announcement.

You can order your Papa Het strings, which come in a tin box designed with artwork by Hetfield, now via Metallica.com. They'll be available through Ernie Ball retailers beginning May 10.

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