DNMG-433-DR 55 DIAMOND(0 RAKE) Carbide Insert ~ DR - Single-side chipbreaker with M-class tolerance has high security on the cutting edge for higher removal rates and low cutting force at large cutting depth and high feed rates. ~ for light roughing of steel and stainless steel. ~ XAB748: Comprising of thick TiCN and thick Al2O3 coatings, the grade has high capability against plastic deformation and good hardness of cutting edge. ~ It is the preferred grade for machining of steel from finishing to roughing. ~ Under the same cutting conditions, the cutting speed can be increased by more than 25%, while the tool life can be 30% longer under the same cutting speed. ~ ISO Insert No. DNMG150412DR ~ I.C. is 1/2" ~ L is 39/64" ~ S is 3/16" ~ d is 13/64" ~ r .0472".