Just so people are clear on the different flares...
The single flare is typically used with AN fittings. The double flare is how a classic brake line is done. The bubble flare is used with many newer domestic cars and older British and European cars.
The Imperial flaring tool will do single and double flares, but not the bubble flare. I think we got our Imperial from the local auto parts jobber or maybe the Snap-On guy.