Off-hand Items are a special form of equipment introduced during Crimbo 2005. These are special items that can be equipped if the player has a 1-handed weapon or no weapon at all.
Off-hand items can only be equipped by a player wielding a one-handed weapon or no weapon. If a player equips a 2- or 3-handed weapon, the off-hand item is unequipped. When a player is using a 2- or 3-handed weapon, off-hand items will appear with a strike-through equip link to indicate they cannot be equipped.
With the exception of the fake hand, you may equip at most a single off-hand item. Equipping the fake hand grants an additional offhand equipment slot. While there is no limit to the number of hands that may be thus equipped, doing so generally gives you you nothing more than a modicum of fleeting entertainment. However, it can be useful when employing the Star Starfish Trick.