Dermal Anchor Extension is the most common application, but this can convert an external threaded piece of jewelry to internal thread. One end is 14G and the other 16G so if you are inserting the 16G end into a 16G internal thread piece of jewelry you will need to use a 14G externally threaded top. This adds no extra length - just changes top type.
If you use this for a 14G internal thread piece of jewelry (such as a dermal anchor) then you will need to fit it with a 16G external top.
