... 3.best price 4.fast delivery TCI Tricone Bits 1-API or ISO 9001:2008 2-Delivery term: ... well, oil field, construction, geothermal, directional boring, and underground foundation work Formation sticky, soft, medium hard, hard formation ... T/T or L/C at sight MOQ 1 Piece Supply Ability 1000 Pieces/month Delivery Time ... within 7 work days 12 1/4'' IADC 537 TCI Tricone Bit for oil ...