The Sontaran baton was a device of Sontaran design.
These long black coloured batons were capable of firing an orange or red beam that was able to stun, injure or kill a target. Furthermore, they were able to repair minor damage to Sontaran technology such as the teleport pod. (TV: The Sontaran Stratagem)
Commander Steg and his troops all carried batons. On his weapons there was a concealed safety catch on the butt of the gun that prevented individuals who were not in possession of this knowledge from firing the gun. (HOMEVID: Shakedown: Return of the Sontarans)