toolmanmike said

This is a perfect open barrel or "W" style crimp. One crimp secures the conductor and the larger crimp is a restraint securing the insulation. The second photo is the correct crimp tool to make these style crimps. There are also some ratcheting tools that make larger gauge crimps. Spark plug wire terminals are crimped with a W style crimp too. I sell those crimp tools also. tmm

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toolmanmike said

I always start with a larger cavity and finish with the proper gauge one. You need to get the tabs starting to bend in the proper direction.

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