1. Refer the carbide blanks , we adopt yg7, (7%cobalt) , this grade is kennametal gave us this grade , that's why we also supply the carbide blanks to kennametal , yg1 2. Anyway , until now , the all customers whatever in usa, canada , or japan, italy are satisfied with the quality of our burrs. 3. Our machines are five-axis cnc that much better than others' 3-axis cnc 4. Original material (tungsten) not recyclable powder 5. Adopt the lucas-milhaupt for braze , 35 crmo alloy steel for shanks. 6. Silver brazing£¬grade is bag24£¬welding temperature is 680-730¡æ 7. The best quality , the longest lifetime in china recently. Cartons or plastic case