12krm is a mechanical back peice that replaces the spine and shoulder blades of a user that has it surgically planted. 12krm is used for those who lose there arms or legs in incidents yet this spasific 12k slowly grows a mind of its own instead if fallowing the users orders or movements. Yet it still seems to be very protective over itself and the human it's attached to. 12k is also able to retreat into the implant there connected to to hide they are also able to detach if needed for repair