... China supplier of TCI tricone bits and pdc diamond bits Size: 3 7/8"--17" API& ... rock bits,kingdream bit,smith bit,tricone bits, diamond bits,PDC bits,TCI tricone bits, steel tooth ... 8” to 17”.There are different PDC (polycrystalline diamond compact) grades and shapes applied for rock formations ... Bearing rubber seal or metal seal Packing wooden box, steel box, or as your requirements Payment Term T/ ...