Piston, a part transferring vertical movement according to diesel strokes from combustion along with cylinder liner, is applied with inertial force according to combustion loads and back-and-forth movements and causes heat-distortion by high-temperature combustion gas thus requires special materials and processing skills against wear and tear, corrosion, wear and fusion on perturbation area. The company is building up trusts on customers with high qualified products through products through production processes and plating facilities specialized only for piston crown based on the quality and stable supply from ourselves, the largest supplier of the said raw materials in Korea.