... tricone bits and pdc diamond bits Size: 3 7/8"--17" API&ISO9001:2008 Brand new MOQ:1 piece API 8 1/2" 5 Blades New PDC Bits ... for Oilfield Well Drilling1-API or ISO 9001:2008 ... can 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 ...