The U.S. Court of Appeals for the Second Circuit again Friday provided prosecutors in New York a victory over the the state’s law on “gravity knives,” which open with little to no effort, such as with a flick of the wrist.

A follow-up appeal by knife owners and a seller who faced enforcement actions in 2010 from Manhattan District Attorney Cyrus Vance Jr.’s office saw the appellate court affirm a January 2017 order by U.S. District Judge Katherine Forrest of the Southern District of New York.