From someone that uses taps on a daily basis, I can tell you that I would not touch most taps that can be found at a hardware store. Most of them are junk. Particually with pipe taps, a poor quality one will be tough to turn ( will not cut well ) & be more likely to tear the thread.
Brands that I like ( by no means a complete list )
Greenfield
OSG/Sossner
Hertel
Remember, you get what you pay for....cheap tools are rarely worth it.
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