Seems like it would be pretty easy to make. I'd imagine someone made one somewhere...
In order to have the power to do what that then did---cut through fingers/bone, and then through the neck, it would need a pretty powerful motor---one that would be bigger than fitting in that small container. Not saying it's not possible. But, cutting through the hand/fingers/bone and onto through the neck with such force like it was nothing?
Think it through, if a person uses the same material and does the same thing, they are using considerable force, so if a little machine like that exists, it's putting out far more force/power than a human doing the same thing...
All in that in a little container.
