Our task was to make a robotic tool compatible with an EVA space suit and that would function in zero gravity. The tool was supposed to a place green wire through twist ties and then secure the wire down by twisting the twist ties. We accomplished this by having 2 L shaped arms sticking out from the motor that were used to grab onto and twist the twist ties. The motor was controlled by a touch sensor that was near the pinky. The first time it was pressed it spun one way, the next time it was pressed it spun the other way and continued to switch back and forth. Our mechanism for holding the wire was unique in that for the placement of the wire, we had a separate non-electrical component that was controlled by the thumb and forefinger. You were able to slide the mechanism and grab onto the wire in order to move it. 

It had to be ambidextrous, which we acheived by adding a strap to the tool, allowing us to place it on either hand. Since it had to be used in "zero gravity", we  simulated this by testing our tool flat on a table, against a wall, and upside down (see video).