The perfect grade of carbide provides the best combination of the sharpness and durability.Ideal for giving you a smooth finish on curved, concave surfaces , hollowing jobs and for general turning applications Designed for Easy Start Finishers/Full Pro hollowers,The right geometry or 30*cutting angle is ground to provide an edge the cuts cleanly and safely Per pack of 10 pcs round carbide insert cutters, Size DIA 12mm X THICK2.5mm-30*, saved more compared with buying only 1 PC Designed with a 30° cutting angle ground to a razor finish for making smooth cuts in any hard wood.