Does what it says. "I bought some jewelry (not from here) that looks like countersink wood screws and M6 bolts. Turned out to be be 16g external threads (seller listed 14g internal threads,) These fixed the jewelry right up. Most of my piercings are 12/14g so the threads match up perfect for me. Be aware, there are 2 different and common thread pitches for 12/14g internal threads. There is a third if you buy certain brands of European jewelry." — Matt (5/5)