We Positive Angle CNC inserts are made of Turning Milling Inserts superior carbide grades for longer life and a smoother finish. Install them into a matching holder. When a cutting edge becomes carbide insert manufacturers dull, bta drilling rotate the insert in wnmg inserts the holder to use a sharp edge. SNMG Insert Larger carbide turning Inserts nose angles and china carbide inserts larger Tungsten Carbide Inserts tip radii provide RCGT Insert a stronger cutting edge but result in increased vibration and a tungsten long inserts rougher finish.