a front face having an elongated approximately rectangular cutting face;

body side surfaces extending rearwardly from said front face to provide added depth of the cutter insert for strength; said body side surfaces including end surfaces along ends of the cutter inset which are obliquely angled relative to the front face to provide end surfaces which are approximately parallel and oblique such that the end surfaces will move in a direction of travel whereas the front face is angled relative to the direction of travel, wherein each body side surface is defined by two parallel opposed edges and an arcuate edge connected to the two parallel opposed edges;

a rear face having a semi-cylindrical shape for engagement into a semi-cylindrical receptacle of a saw tooth link;

chamfered corners along the front face and at least portions of said body side surfaces to reduce the risk of breakage of the inset at the corners and having said body side surfaces extending rearward from the front face along the sides of the cutter inset;

whereby the shape of the cutter inset provides a depth from the front face which extends rearward between the front face and the rear face.