http://shadelms.blogsome.com/images/whitesmith.jpg
 
Stronger versions of Blacksmiths, they forge more and now allowed refine weapons (but not armors). They are the only job in the game to upgrade weapons with a bit higher chances than NPC’s based on their job level. The +10 weapons can be easily achieved by Mastersmiths. They deal larger amounts of damage with High Speed Cart Ram (Cart Termination)(with a cost of certain amounts of zeny) and can destroy their enemies armor and weapons. They can power up themselves with bigger amounts of money in the form of Maximum Overthrust. This job is known as Whitesmith in other localizations.
 
 
for skill description click this link