1.The plastic parts are assembled without gaps, which is connected by split line and looks very perfect. 2.The cover is made of ABS material, the surface with high hardness, good chemical resistance, heat and corrosion resistance and impact strength. 3.There is no any flash burr on the cover, the surface is very flat and nice. 4.The key blade is made of copper and processed by vacuum heat. It becomes more resilient and easy to cut. 5.Best replacement for a key with broken buttons or worn key case.