Engineer Inc., the tool company that invented those Neijisaurus pliers for removing stripped screws, has developed these precision crimping pliers:
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Here’s how they work:
In this video below you get a close-up of the crimping action (warning, turn your speakers down):
I don’t crimp enough wires to know if these would be worth the extra step, but these tools hail from Japan, where precision is often given a higher priority than speed.
Source: core77