"They are made of a variety of materials, including stainless steel, titanium, and gold. They come in a variety of sizes and shapes, to suit different piercings. Some have decorative elements, such as jewels or beads. They are typically inserted through a piercing needle and then screwed into place. They are relatively easy to care for, and can be removed and replaced as needed. They are a popular choice for piercings because they are comfortable to wear and can be customized to match the wearer's style".