The Privilege for choosing Specialist pure job is you can craft a weapon, armor, and shield.

Craft skills defined by Craft PT.

Since you are Specialist, when you are level 30 (Second level job to Craftsman) and level 40 (Third level job) you will get some Craft PT experience after change job in Race Manager in HQ.

Start from Craft PT 1

1st Job Promotion (Lvl 30)

2nd Job Promotion (Lvl 40)