Abstract: A grader bit comprising a tool end having a shank extending axially inward therefrom; the shank having a circular cross-section; wherein a first shoulder extends radially outward relative to the shank and is located axially inward of the tool end; a second shoulder extending radially outward relative to the shank is located axially inward of the first shoulder, wherein the first shoulder and second shoulder are separated from each other by a spacing; the shank including a boss at an axial inward end thereof, the boss defining a socket extending inward into the shank from the axial inward extremity of the shank, wherein a perimeter of the socket includes at least one facet against which a force is applied to cause rotation of the shank.