Earring Stud Posts These Earring Stud Posts are made from Surgical Steel and have a 6mm Flat Pad and a 10mm post. 100 Pairs Per Pack Why use Surgical Steel for Earrings? Surgical steel is much less likely to cause infection or irritation so is excellent for people who are sensitive to some metals. This, plus the fact that it won’t tarnish or rust makes it a great choice for wearing every day. It is also more affordable than other options, even base metal plated findings. Jewellery Metals Information