The full face tempered glass by Techsuit is a full-coverage hardened glass, specially designed to protect your mobile phone screen from scratches and other damages. In case of a phone drop, it does not guarantee that the screen will not break along with it, but it provides additional protection. It does not affect the screen's functionality. The black border covers the entire surface of the screen, including the edges. It has adhesive across its entire surface, unlike edge glue glasses that have adhesive only on their perimeter. This helps in better fitting and seamless touch screen functionality. It also prevents dust from getting underneath, which can happen with edge glue when the perimeter adhesive wears out.