The 750 MCM Cu/Al Crimping Jaw with 400-750 MCM Al 6T U Style Dies is the Most Accurate Way to Crimp, producing cULus classified crimps according to the UL 486A-B classification standards for #8 - 750 MCM Copper & Dual Rated Anderson, Blackburn Burndy, Ilsco, Panduit, Penn-Union and Thomas & Betts Connectors. The crimping jaw uses MILWAUKEE U Style Dies that feature vivid wire size markings and industry-standard color markings. The aluminum crimper dies also imprint wire size onto the connector after crimp completion. The crimper is made for commercial electricians and is designed to provide you with ease of use and easy inspection. For use with our M18 Force Logic 600 MCM Crimper (2679-20).