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

4″ New Button Bit with 2-3/8 API Regular Pin (IADC Code: 521)

4-7/8″ New Button Bit with 2-7/8 API Regular Pin (IADC Code: 522)