Stainless steel, titanium materials. Pierced nails are usually made of stainless steel or titanium metal materials. Both materials are widely used in the manufacture of pierced jewelry because stainless steel and titanium metal materials have good durability and adaptability and can meet people's requirements for safety, comfort and durability. sexual needs. The stainless steel material has good corrosion resistance and wear resistance, is not easy to rust, and is suitable for long-term wear in humid environments. Titanium material has light weight and excellent biocompatibility. It will not cause allergies or irritation reactions and is suitable for people with sensitive skin.