Carbide rotary files 1. Material YG8 carbide and alloytoolsteel 2. Approveled by GB9206-88, ISO07755/1-1984 Carbide rotary files: 1. Material YG8 carbide and alloytoolsteel 2. Approveled by GB9206-88, ISO07755/1-19843. Model SE-41M;SE-1M;SE-3M;SE-5M; SE-6M; SE-7M; Carbide rotary files