400 MCM Aluminum 6T U Style Die. The M18™ Force Logic™ 600 MCM crimper w/ 750 MCM expanded jaw is the most accurate way to crimp producing cULus classified crimps Perfectrding 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.