Opponents of New York’s ban on so-called gravity knives have asked the U.S. Supreme Court to step in and address what the writ claims is a circuit split over vagueness constitutional challenges highlighted by the suit.

The petition to the high court comes after the three petitioners—two individuals who were prosecuted by Manhattan DA Cyrus Vance Jr.’s office and a retailer fined over its sale of certain knives—saw the U.S. Court of Appeals for the Second Circuit in June 2018 affirm the district court’s ruling in favor of prosecutors and police.