They are for use in general machine tapping or CNC tapping.
Hand Tap and Drill Set comes in an easy to maintain plastic pouch. Set contains one High Speed Steel Hand Plug Tap and the matching size. Black Oxide High Speed Steel Drill Bit Hand taps are the most versatile taps for hand use, or for tapping under power. Hand taps are also appropriate for tapping the vast majority of materials in through or blind holed conditions.