The crimping jaw uses Milwaukee U Style Dies that feature vivid wire size markings and industry-standard color markings. For use with the M18 Force Logic 600 MCM Crimper (2679-20). Includes: 49-16-U111 750 MCM Cu/Al crimping jaw, 750 MCM Al U style die (49-16-U750), 600 MCM Al U style die (49-16-U600), 500 MCM Al U style die (49-16-U500), 400 MCM Al U style die (49-16-U400).