High-risk Kings Cross clubs, pubs and hotels will from next month use ID scanners as part of the NSW government's crackdown on alcohol-related violence.

The scanners were originally supposed to be rolled out across 35 Kings Cross licensed venues in December last year, but will now be used from June, Hospitality Minister Troy Grant confirmed on Thursday.

Illustration: John Shakespeare

"This is a vital tool for the police," he told parliament during question time.