• Professional-grade design ensures that the tap stays centered during insertion, providing clamping and alignment functions.

• Works with all taps meeting JIS standards, up to SAE 1/2", metric M12, including 1/8" NPT and BSP.

• Contents: 3 pcs 1/4" Dr. / H12: #1, #2, #3.

                  4 pcs 3/8" Dr. / H17: #4, #5, #6, #7.