This is a metal finish that is applied through a Physical Vapor Deposition (PVD) process. If you've seen gold TiN coated drill bits, you've seen PVD. The coating process involves the depositing of diamond-like carbon coatings via a vacuum and an electrical charge. The result is a DLC (Diamond Like Carbon) coating that will provide years of protection against wear while retaining a nice appearance. Ionbond’s unique application process makes it a finish that does not chip, crack or peel as it is a micron level coating. Diamond Black is generally 2 to 5 microns thin. This is not a conventional coating that adds thickness to the material; this is a micron level coating, which is an excellent choice for custom fit guns. There is no distortion of details or build up in the corners, which means consistent performance every time. Diamond Black provides the ultimate protection against holster wear, corrosion, bearing surfaces, and rough handling.