The Sd.Kfz.11/4 was a modified version of the basic 11/1 3 ton and was used to tow 10cm mortars and later to carry 15cm and 21cm Nebelwerfer rockets, the vehicle was also used to tow the NbW 41 and NbW 42 rocket launchers. Basically identical with the 11/1 except for the rear storage compartments being enlarged to allow room for the rockets. The width of the rear section was also increased to allow the storage of longer rockets.