Purpose: AP-50BI battery cable terminal crimping tool is designed to crimp 8, 6, 4, 2AWG copper / tinned eyelets in special trapezoid profile. Suitable for: Heavy duty wire lugs, battery cable ends, bare copper eyelets, tubular ring terminal connectors. Rotary Die Set: Rotating color coded jaw allows easy identification and one hand die change. Ratchet mechanism assures a full cycle crimp before releasing and provides stable platform for repeatable terminations.Release trigger helps clear mis-crimps and obstructions easily. Comfort grip handles helps reduce fatigue during common use.Eccentric adjustment button to adjust the tool to obtain the proper force value. Applications: Commercial Vehicles include emergency vehicles, generator sets (Gensets), recreational vehicles, trucks, cranes, and lifting equipment.