... 2008 8 1/2" New PDC Bits for Well Drilling Description about sell rock bits,tricone bits, ... field of mine, transportation, tunnel and hydroelectric for shelving reticular support.Model114,117,127,437, ... Steel tooth bits, PDC bits Applicable water well, oil field, construction, geothermal, directional boring, and underground ... L/C at sight MOQ 1 Piece Supply Ability 1000 Pieces/month Delivery Time within ...