The ratchet on these tools applies the right amount of pressure to make sure the crimp is complete every time. Since you insert the wire ferrule from the front, they're useful in tight spaces. They automatically adjust to the proper crimp size for different wire ferrules.

Unlike ratchet crimpers that require repetitive motion, these battery-operated crimpers quickly create crimps with a press of the trigger. Release the trigger and their jaws automatically open for the next crimp. Use them to take on your high-volume crimping tasks. You can also press the trigger part-way down to adjust your connector to the ideal position before making the complete crimp. An LED light illuminates workspaces, so you can accurately position connectors with the required dies (sold separately). Keep multiple dies on hand for the flexibility to crimp a wide range of butt-splice connectors and ring and spade terminals.