Viking Drill and Tool 37833 Type 33-UBN Straight Flute Bottom Style Magnum Sup Prem Tap Bit, 10-1.25mm Premium Metric High Speed Steel TiN-Titanium Nitride Coated Straight Flute Bottoming Tap Titanium Coated Straight Flute Tap Pitch Limit D-5, Metric Bottoming Tap Metric Bottoming Tap, Titanium Coated HSS Straight Flute Bottoming Tap