Alfa Tools HTS270000 0-80 HSS Eco Pro Hand Tap Set Eco Pro hand tap 3 piece set 0 by 80 tap size, 2 flutes General purpose taps can be used by hand or under power, in through (open both ends) or blind holes (closed one end) Super high-speed steel, ground thread, right hand ground thread, right hand 1 each taper, plug, Bottoming style