Steinheil GLAS.t SLIM is made to protect the LCD from damage and scratches with specially processed transparent glass that has been reinforced to increase shock absorbency. The glass has been designed to be 35% slimmer and still maintain its high level of surface hardness of 8~9H. When installed, there are no gaps between the LCD and the GLAS.t SLIM which means the touch screen"s sensitivity is unaffected. To prevent any excess force from coming in contact with the edges of the screen protector we highly recommend that a case is used with the GLAS.t SLIM.