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This mod adds a special item to the game that allows you to repair weapons and armors out in the Zone. The only way to get this item is to loot it from a person's corpse. To choose which item you want to repair, you must unequip everything (including your armor), then equip the one item you wish to repair. After that, just click the repair kit and your item should be repaired. There are options so you can use this mod with Oblivion Lost or Oblivion Lost + Arsenal Merge. To do that you must use the folder with the name of the mod you're using. You can also change options for the actual repair kit, in the options folder.