BCRs, ball closure rings for a variety of body piercings. These body jewellery rings & belly rings can be used in most curved body piercings.
Bcrs and Belly rings for most body piercings, these are surgical steel body jewellery or titanium body jewellery,as stated.
Ball closure rings have clip in balls so to wear them you need to get used to how to open and close the jewellery. It is best to practise a few times until to get used to how they work if you want to fit your own body jewellery.