The MRC840AL mechanical rotating crimp tool for aluminum Hylug™ and Hylink™ terminals and splices from #8 - 4/0 AWG aluminum and copper conductors. Butting steel jaws and over center cam action assure full crimp force. The rotatable die wheel is color-coded and stamped with the conductor size to provide an easy match of the die and color-coded Burndy® Hydent™ terminals and splices. YA, YS, YA-A and YS-A series of copper and aluminum terminals and splices are UL Listed when installed with these tools. Comfort grip handles, aids in prevention of hand slippage, reduces fatigue during continuous use Heat treated steel jaws, reduces jaw buckling and misalignment, under heavy loading Approximately 9000 crimp cycle life, lasts longer than imitations and will still be working when others have worn out Multiple grip selections on rotatable die wheels, no lost dies, 9 position color-coded rotatable die wheels High strength fasteners, increase tool life by reducing tool wear