What is the difference between an internally threaded and an externall – Helix & Conch
Steel N Ink Collingwood - Let's talk about jewelry threading! With so many different options out there, it can be unclear what's good and bad for your piercings. Externally threaded jewelry has
External vs Internal - How does your jewelry thread? - BodyMods
External vs Internal - How does your jewelry thread? - BodyMods