They are for use in general machine tapping or CNC tapping.
Hand taps are also appropriate for tapping the vast majority of materials in through or blind holed conditions. Black Oxide High Speed Steel Drill Bit Hand taps are the most versatile taps for hand use, or for tapping under power.Black oxide high-speed steel dill bits are ideal for production, maintenance or portable drilling jobs and are surface treated with abrasion-resistant black oxide.