Name: 6-3/4" New Button Bit with 3-1/2 API Regular Pin and a Sealed Bearing (IADC Code: 515)
SKU: TB63/4515

8-1/2″ New Button Bit with 4-1/2 API Regular Pin and a Sealed Journal Bearing (IADC Code: 517)

6-3/4″ New Steel Tooth Bit with 3-1/2 API Regular Pin (IADC Code: 211)