... Best quality and low price 3)Longer drilling intervals 4) API &IADC 1)Bits size range :3 ... Best quality and low price 3)Longer drilling intervals 4) API &IADCBrawny Tricone Bits1)Bits size range ... cone offset, results in high bit penetration rates.4)The deep intermesh of cutter rows prevents bit ... 5/8:",3 7/8",4",4 1/2",4 5/8",4 3/4",6",6 1/2",7 ... ",9 5/8",9 7/8",12 1/4",15",15 1/2",17 1/2", etc. IADC Code ...