Spanner for tightening and removing Euro-cone radiator compression fittings with A/F 30 mm cam lock and hex nuts. Short, flat version with ratchet. Ratchet facilitates tightening of straight and elbow compression fittings underneath radiators. Head end socket for 1/2” extension. The extension is used as a handle and also provides higher torque. Side socket for 1/2” extension for working with the ratchet in front of the radiator. Socket for no. 3801 combination stepped key 3/4” radiator valve nipples. DBGM (= German Utility Patent).