Internal thread tops come in a variety of colours and styles, featuring an array of jewels and gems. Internal threading involves the threads being located on the ball top, which screws into the post.

Internal thread tops come in a variety of colours and styles, featuring an array of jewels and gems. Internal threading involves the threads being located on the ball top, which screws into the post. Internally threaded jewellery offers a smoother finish, enhancing shine and making insertion more comfortable.