The films can be super glue, place top edge on the touch screen, or the like with a credit card drive slowly from top to bottom, disconnecting the carrier foil on ... and already the film it! And the best part is: you can see nothing ... no creases, air bubbles, etc., the film adapts to super. After many previously processed films this is by far the best! I would buy them again at any time and unconditionally recommend it!