This kit is an excellent kit. Very precision flares every time!!
https://store.snapon.com/Flaring-Tool-Sets-Blue-Point-Set-Double-Flaring-Tool-P644043.aspx
That looks to be the same kit I used. Didn't work "every time" for me, but I got a usable bubble on the 3rd or 4th try. Grinding a nice, smooth chamfer on the end of the line seemed to be the trick, along with lots of lube.This kit is an excellent kit. Very precision flares every time!!
https://store.snapon.com/Flaring-Tool-Sets-Blue-Point-Set-Double-Flaring-Tool-P644043.aspx