... (Steel tooth & TCI bit),Tri-cone Bit,Three cone bit,Tricone Drill bit,tungsten cabide inserted bits,Tricone rock bit,Milled tooth bit,Roller Cone Bits ... Bits1,Types: steel tooth tricone bit (mill tooth tricone bit) and tricone bit(tungsten carbide inserted tricone bit),both of which are used for ... clays, salts and soft li mestones. Size and IADC available: 3 3/4" to 26" IADC 415,435,445,417,437,517,537 ...