Welder Dave
Senior Member
I bought a Nicopress crimper and nickel plated copper crimp connectors from an aircraft supply store. The crimper fits 3 sizes and just uses 2 bolts to tighten the dies. You could use a vice too. It has a metal gauge with notches to tell you if you crimped it enough. The copper crimp fittings are stronger than aluminum. The crimper is certified for aircraft use. It wasn't too expensive. There are also bigger crimpers similar to bolt cutters but they are a little pricey.