Material: TA2 Titanium / TA4 Titanium. Made of High-quality, High-purity Titanium (TA2) Material. Using Advanced Casting and Extrusion Technology - Smooth Surface Without Burrs. Jewelry Making: Great for Making Butterfly Earrings, Rings, Jump Rings, Bracelet, Necklace Chain, Wire Wrapped Pendants or Other Craft Project.