... ,lathe tool bit. Grade of Carbide: K10,K20, P20,P25,P30 ,P40 Carbide Tipped Tool Bits,Carbide Brazed Tool Bits,Turning ... BitsGrade of Carbide: K10,K20, P20,P25,P30 ,P40DIN4971-ISO1DIN4973-ISO8DIN4975-ISO10DIN4977-ISO5DIN4980-ISO6DIN282-60° - ISO12DIN263 - ISO11DIN4972-ISO2DIN4974 ... -ISO7DIN283-60° - ISO13 Carbide tipped turning lathe tool bit K10 P30