Cutter (16) for a vegetation cutting tool (10) comprising a mounting portion (20) and a blade portion (22), wherein the mounting portion comprises a first and second mounting sections (38,40), wherein the first mounting section has a first outer diameter (44) and the second mounting section has a second outer diameter (48), wherein the first diameter is bigger than the second diameter.Rotary support head (18) for the cutter (16) of a vegetation cutting tool (10) comprising a mounting seat (60) and blade opening (64), wherein the mounting seat comprises a first mounting seat section (80) and a second mounting seat section (82), wherein the first mounting seat section has a first inner diameter (86) and the second mounting seat section has a second inner diameter (90), wherein the first diameter is bigger than the second diameter.
