The Klein Tools 34055 Ratcheting Ferrule Square Crimper crimps 10-22 AWG ferrule terminals. This tool features four crimping dies that surround terminals 360 degrees for a high quality square shaped crimp. The unique design provides a low effort to crimp while maintaining a high terminal pull-off force. A built in ratchet ensures full-cycle crimping for a complete uniform crimp every time. Users are provided with dual layer molded grips that provide a high level of comfort during use.