Ordered up one of these flaring kits to do the 37 deg flares for the AN lines just to find out that they list as a 3/8 line hole in the flaring bar is not. Didn't have the most positive feeling on it since it's made by Performance Tool & none of their tools last past 15 minutes of use. I grabbed some scrap copper nickle just to see if it would do a usable flare. This where I saw that the 3/8" tube was too big. So I still snugged it up to watch it turn a circle into an oval. I compaied it to the bar in my 45 deg set & the 3/8" hole is smaller on the POS set. I went cheap to save some money now I return it to get my money back.