An inventory item can be further improved through the use of Gadgets. Some items have open or closed (locked) Gadget slots. Gadgets can be found as loot in the Central Wastelands or off of vendors. If the Gadget slot is open, a Gadget can easily be added to the item (within class/race/level restrictions). If the Gadget slot is locked, it must be opened using a particular type of gadget kit available at vendors (or as loot).