Features: More convenient and secure crimping operations Dies are made of hardened steel with chrome finish Crimps aluminum and copper wire Rotatable crimper head for adjustable directions Tool free for changing dies quickly Stong retainer pin could held dies securely in place On/off knob for fast tool operation Comes with a durable plastic case Max operating pressure: 10 T Max operating stroke: 12 mm Best among the battery cable lug terminals’crimpers.