Alfa Tools hand taps carbon steel - cut thread, right hand, bright finish. Ideal for hand threading in Routine maintenance, repair work and for Rethreading applications. Taper taps (7 to 10 threads) longest chamfer insures easier starting. Plug taps (3 to 5 threads). most common chamfer, used in through or Blind holes. Bottoming taps (1 to 2 threads). used for threading close to the bottom of a Blind hole.