Rockwork: featuring the komatsu kvx lip and g.e.t. System - this is a line of heavy duty and extreme service excavator buckets that incorporate the unique komatsu kvx system. Komatsu promotes the system as having three major advantages over conventional systems. These are: reversible teeth and wear plates parts that bolt together withe special conical-neck bolts special 500 - 600 brinell sagitta steel.