Airborne DayZ utilizes DNAkeycards to give access to various colored vaults. The 
color of the vault corresponds with the quality of the loot. The quality of the loot is shown here: Purple -> Red -> Blue -> Green -> Yellow -> Orange (Rarest).

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Crafting the Bench:

To build the workbench, you need to craft the kit with a metal wire and 4 sticks (sharp or short). Then you need to acquire the solder kit and helping hands kit and place them in the workbench kit before you can place the hologram. Once the hologram is placed, you need to insert a metal wire, 16 bolts, 5 metal sheets, 13 planks, laptop, and a card reader. From there you can take a hammer into your hands and assemble the workbench in place.

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Using the Bench:

You need a 40v battery to use any of the bench's features. (you get 15 uses per battery) You can clip an error card to the helping hands, then on the soldering iron you can remove the chip. Once chip is removed, you need to open the drawer of the workbench (upper left side) to access it's inventory. Place solder, flux, and your desire tier chip in the slots. Close drawer. You can now solder the new chip by interacting with the soldering iron once again. (Solder and flux have 5 uses each) Now you can remove the card from the helping hands and place it in the reader. This requires no further ingredients, program the card via laptop, then remove and activate.

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Keycard Trader:

You can access the keycard trader buy traveling to  VMC, Stary Mil or Survivor's Last Stand and using the warp door to the bunker . Once in the bunker, you will have to fight dangerous AI down to the bottom level of the bunker where you will find the trader. From here, you can purchase "Blister Pack" that allow you to program a keycard with the corresponding color of Blister Pack.