These classic studs are made from stainless steel bezel posts, recycled bullet casings that have been cleaned and cut down to the headstamp with a spent primer. Headstamps vary by brand but each pair will always match. An assortment will be curated for your order this provides your shop with an unique variety. Examples include: Gold with gold primer, gold with silver primer, silver with silver primer and silver with gold primer. All posts are a stainless steel color. Posts are hypoallergenic and will come with a butterfly back and a rubber back.