I bought a cheap Hf tap set in a plastic case. Carbon steel so not expecting much, but lifetime guarantee. Went to use the tee wrench and could not tap a #10 hole that is already tapped, just painted over. a bit. the bit slipped in the jaws.
It turns out the jaws in the collet are not square to grab the square end of the tap. They are round and just slip under load on the hardened shaft. No possible way it can work. A drill chuck will provide better grip. Lucky I have some real tap handles to use.
Bill D