... API 2))used for water well, oil field 3)multiple gauge protection steel tooth tricone bit,steel tooth ... ,steel tooth tricone bit1.Sizes range from 3 7/8" to 26" , normal sizes consist of 5 ... ", 9 5/8", 9 7/8", 12 1/4",13 5/8", 14 3/4", 15 1/2", 16 ... 26", etc. .2.Covers almost all IADC codes .3. Steel tooth bits is always rubber O-ring sealed ... which will decrease the cost of project. 3 7/8''Steel Tooth Bit