Only the Barbarian is able to use two weapons at once. For Diablo II, we have increased the number of weapons that can be shown on your character.
Socketable items are user modifiable.
Placing a Gem on an item gives the item a beneficial magic effect. The rarity of the Gem determines the strength of the effect. Place the item in your inventory, and then place the Gem you wish to socket by dragging the Gem over the Socketed Item and left clicking on it. No, so be sure to choose wisely before using a Gem in a Socketed Item. Blacksmith NPCs can repair items.