Corbin hose clamps

Corbin style clamps apply pressure more evenly than screw clamps, but have to be properly sized.

That's their secret.

I got an aftermarket kit for my Satellite ans except for the one non-OEM sized heater line I have, they all worked great.

Note some AC equipped small blocks have an extremely difficult to get at clamp under the compressor bracket.
Mine had a screw clamp there and I can't see a way to get corbin clamp pliers on it.