The necklace, according to his grandfather, was newly created by Italy’s magical research department for Aurors who dealt with no-maj and magical issues. It helped protect from some no-maj projectiles as well as magical explosions of power. With his influence in the Ministry, Lord DiNozzo had secured one for Tony. He wasn’t looking forward to testing it in this situation. It might not be able to protect him from getting magical diseases, but it should help offer some protection from a trunk bomb.