PanzerGlass Tempered Glass Screen Protector for Apple iPhone 6 (4.7 inch) PanzerGlass is only 0.4 mm thin. Hardness of PanzerGlass is 9 times stronger than regular glass. Even sharp objects such as knives and keys will not scratch the PanzerGlass. Oleophobic Coating. PanzerGlass has an oleophobic coating that prevents fingerprints and other contaminants and makes the glass easy to clean.