Diablo II: Larzuk
Larzuk is the blacksmith of Harrogath in Act V. He gives the first quest in the last act, asking you to slay the monster Shenk the Overseer. As a reward, he will provide you with the chance to socket one equipment.
If you would like to find out how to make the socketing service permanent, read this guide.
Repair - repairs damaged Weapons and Armor for a price.
Trade - sells Armor, Weapons, Bolts, and Arrows.
Siege on Harrogath