... supply rock bits,kingdream bit,smith bit,tricone bits, diamond bits,PDC bits,TCI tricone bits, steel tooth bits, milled tooth bits, TCI rock bits, oilfield bits and so ... )2. Gneiss, Diorite, Basalt (For hard and abrasive formations)3. Quartz, Granite (For very hard and high abrasive formations)Being widely used in ...