The SN-025 crimper makes “B” profile crimps over the stranded wire and “O” profile crimps over the wire insulation simultaneously.

Make sure that the insulation tabs are entirely located to the left of the line that runs down the center of the lower jaw, the conductor tabs are located completely to the right of that line, and the plug section is entirely outside the crimper jaws.

If you decide to try a different arrangement, the jaws can be removed and replaced by using a 2.5mm hex wrench.

It crimps in both places simultaneously, which means you don't have to crimp twice, and it is very convenient.

Squeeze the crimper handles as far as they will go, and they should release automatically. If the handles don’t release automatically, it's probably a sign that the crimp force is set too high.