For over 40 years Studex has been recognized as the leader in ear piercing systems and allergy-free earrings for consumers af all ages. All Studex ear piercing studs and hypo-allergenic earrings are created using US made surgical stainless steel, karat gold, and titanium raw materials. Studex ear piercing studs and cartridges are packaged and sterilized to meet or exceed US F.D.A. and EC European standards.