Newark Mayor Cory Booker is collaborating with jewelry designer Jessica Mindich to repurpose guns and bullet casings into accessories—the legal kind.

The always-innovative mayor’s new project, The Caliber Collection, features utilitarian-chic bangles and cuffs made from the steel of 250 confiscated guns and brass of shell casings swept from the ground of crime scenes. Each piece has the weapon’s original serial number stamped into the hammered metal that wouldn’t look out of place on the arm of the Alexander Wang-wearing set.