The answer is no… and yes.
The Flaring SPIN Tools delivers a ~40º flare, that will take its final shape, reaching from 36° up to 47°, once it is “sandwiched” between the valve and the nut, with the help of a wrench. Better, not only the angle will provide a better sealing, due the perfect packing, but it’ll completely avoid cracks and leaks, due the recrystallization that will keep the copper ductible during all the process.
Watch the video and learn more: