I don't like cheap no-name brand tools. Sometimes they are ok, but others they don't last worth sheeat.
I've got my dads tools from when he was 16. Most are Craftsman, and I still use every day, some of them are cheap jap tools and if I keep them they only get used for pounding and pressing...
Read a little further, I bet it says 700 foot-pounds at a certain pressure and flow rate, and I bet you were not meeting one or both of those requirements.
I've got decent compressor capacity, at cont. 135. However, I use a cheapo Northern Tool Impact. It works pretty well, be sure to use good, large air hose, I tried mine initially with that cheap yellow coiled stuff and it barely worked, upgraded to the good 1/2 stuff on a reel and now it...