MyBat Tempered Glass Screen Protector for Kyocera Hydro Life and Hydro Icon The surface of The Tempered Glass has a hardness of 8-9H three times stronger than regular PET film. Even sharp objects such as knives and keys will not scratch this product. The Tempered Glass has an oleophobic coating that prevents fingerprints and other contaminants and makes the film easy to clean. The Tempered Glass has an oleophobic coating that prevents fingerprints and other contaminants and makes the film easy to clean.