The dash air conditioning in our motorhome was broken and I saw there was a leak from the fitting going into the compressor. Everyone I called to fix it wanted to remove the 40 foot lines from the RV and take them to a shop to install the new fittings. This would have cost $400-500 dollars so I decided to fix the connector myself with the mastercool hyrda-krimp a/c crimping tool.

I needed to upgrade to the $300 dollar crimping tool because I wanted to do the work in the engine bay and not at a vise, but the cheaper ones work just as well.

The $140 dollar crimping tool:
https://amzn.to/2aiL0rZ
My manifold gauge:
https://amzn.to/29KXg8w
The more expensive crimping tool I bought:
https://amzn.to/29Kr2V8