KYOCERA Turning Insert, Single Sided, DNMG Insert, 1504 Insert, Rhombic Shape, 12.7 mm Inscribed Circle, 4.76 in Thickness, HQ Chipbreaker, 0.8 in Corner Radius, 5.16 in Diameter Hole, Manufacturer's Grade: TN60, ISO Code: DNMG150408HQ TN60, 55 deg Included Angle, 0 deg Relief Angle, Cermet, TiCNNbC Coated, For Use On: Steel