I wanted to go big baller on my cooling system with -20an fittings for radiator hoses. This little guy let me do just that.One problem, the threads were WAY too tight, I could barely get a Vibrant AN fitting to thread on. I had to buy a die and run it over the existing threads. I don't understand the problem though because the die I used just scraped a fine layer off the existing threads, which made the fittings I had thread on smooth as butter.My setup used a Gates brand LS2 style water pump for anyone interested.Overall the machining was beautiful just the threads were a little "fat".