... ,121,227,417,437,517,547,617,637Applicable forPetroleum & gas, water well and mining Bearingmetal bearing(HJ), rubber bearing(HA)Advantagehigh ... bitsmall tooth, big tooth, conical inserts, chisel insertsMaterialalloy steel, carbidePackingwood box, steel boxPaymentL/C,T/TDeliveryby ship or plane within 30 ... bits : API steel tooth tricone bits 7-7/8HA116 FOR OIL AND WATER WELL DRILLING