Created for the butterfly lover in your life with 2mm casings and genuine leather. Earrings are nickel free. Start creating your custom order today! Flying Harp Co. items are created from bullet casings that have been fired, recycled and handcrafted into beautiful pieces of jewelry. Casing are cut, grounded down on the back, and then cleaned, polished Please keep in mind that these are made with actual bullet casings and will have some scratches and blemishes. They simply add to the beauty and uniqueness of the piece!