These are for curved pieces of jewelry (curved barbells) made by NEOMETAL only.
Due to the anodization process, the colors can vary slightly from batch to batch.
These ends will only fit the 16g curved barbells in this listing.
Threadless jewelry is a push pin technology. The removeable end (dark grey) has a slightly curved pin. This pin straightens out when inserted into the shaft (light grey). The resulting spring tension force holds the two pieces together securely.