system
Given the following post, respond as if you're commenting on Reddit:
human
[Mass Effect] What to Omni-tools actually look like?

Standard Omni-tools project a holographic interface on the user's arm which can be used for hundreds of different things. What I don't understand is where the actual tool is kept. I assumed it was part of the armor characters wear but Shepherd can be seen using his with bare arms. Is the omni tool some kind of chip implanted into someone's arms?
gpt
Not sure, but in the Citadel DLC for Mass Effect 3, a character can be seen activating their omni tool via a disc embedded in the palm of their glove. I'd imagine that simpler omni tools could be implanted.