... foundation work Formationsticky, soft, medium hard, hard formation Bearing rubber seal or metal seal Packing Plywood box, steel box, or ... ,like: Tricone Bits (Steel tooth & TCI bit),Tri-cone Bit,Three cone bit,Tricone Drill bit,tungsten cabide inserted bits,Tricone ... and high projection. This cutting structure design combined with maximum cone offset ,results in high bit penetration rates.the deep ...