I have two blue-point kits, sold by snap on, made by someone else.
Has worked great for me for years. Others have used my tools, and broken the little tit off on the 3/16 size double flare piece, I presume from operator error, even after extensive demonstration, oh well.
There is a knack to making proper flares on brake lines, and using the tool. Keeping the tube tight in the holder is one of the biggest problems. Next is the height of tube to be flared, as if there is too much tube above the holding tool, the tube will not crush and be supported properly, and be damaged, and then getting it flared square.
Practice, practice, practice. Sounds pathetic, but it is the truth.
Good luck!
-Steve