Proof of consept I guess.

Doesn’t separate your entire arm just ur hand but eh.

Stick figure ain’t that good, I could do better but I’m lazy so. I might re do it though
Here’s a link if u want
I’m thinking there’s a button or a hole in the wall someone touches it and it stabs into their hand then the others have to do something to release them or it destroys their hand.
https://filebin.net/9en0or1e6giqrp14/mrjd__1_.nodes?t=1zqx41yo
Edit: I should give it hooks on the ends so the person can’t pull it out.