Crossrock is a musical instrument case and bag manufacturer headquartered in Paramount, California. The brand grew out of Kingstar International, an OEM supplier established in 1997 that produced cases for some of the world's largest instrument case brands. Crossrock launched as its own branded line in 2007 and has since expanded distribution to over 25 countries.

The company specializes in protective cases built from fiberglass, ABS plastic, and wood across a wide range of instruments. Their catalog covers guitars (classical, acoustic, electric, archtop), saxophones (soprano, alto, tenor, baritone), ukuleles, violins, violas, cellos, mandolins, banjos, trumpets, trombones, French horns, clarinets, and keyboards, along with gig bags, rack cases, and accessories like replacement straps and case covers. Notable product lines include the CRF fiberglass series, CRA ABS-molded series, and CRW wood case series.

Crossrock has built a following in the mid-price case segment, with musicians on forums like the Unofficial Martin Guitar Forum, Sax on the Web, and classical guitar communities praising the cases for their lightweight construction, clean aesthetics, and strong value relative to price. The brand also offers artist pricing for working musicians and partners with luthiers to create custom-fit cases.