This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
More slender than the DOT-7, the robot had a detachable head and arms. It could use both of its arms for welding, as opposed to the older-style robot, which could only use one. The robot possessed anti-grav technology, allowing it to hover inside starships and space stations.
In 3189, these robots, working alongside the DOT-7s, participated in the retrofitting of the USS Discovery, while at least one of them performed routine maintenance on the Federation Headquarters. (DIS: "Scavengers")