Cutting tooth for earth working equipment

The invention relates to a groove is operation tool, particular the groove wall cutter's of the cutting teeth, wherein the cutting tooth with for receiving, wherein the land a tooth of the retainer and located and at least one is configured to perform on the working to the soil the main cutting member. So as to widen of the major cutting blade member and section, at least one reamer element is arranged, wherein the tooth plate of the top, and at least one element reamer with the major cutting elements compare with a cut different frame is designed.