Installing window security film may be a terrific way to improve the protection and safety of your house or organization. Hello! To install the 39-310 clip, you will need to slip it onto the underside/within the glass louver. Each finishes about the clip have an angle bent in reverse Instructions; https://martin2owel.tblogz.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-how-to-install-securit-glass-45879189