Nokia Lumia 521 Screen Protector, IQ Shield LiQuidSkin Full Body Skin + Full Coverage Screen Protector for Nokia Lumia 521 HD Clear Anti-Bubble Film - with The IQ Shield Nokia Lumia 521 Front and Back Skin Protectors include our proprietary protector, installation tray or solution, squeegee, lint-free cloth, and intuitive installation instructions Innovative LIQuidSkin adhesive coupled with our unique IQ Shield wet-install method ensures easy, bubble-free and frustration free installation that will leave the film perfectly contoured to any device Unlike other common screen protectors, IQ Shield LIQuidSkin protectors are crafted using a revolutionary process that melds high response sensitivity, self healing durability, and non-yellowing, optical transparency into a single layer of flexible yet tough film Classified as a smart film and optically transparent once applied, the LIQuidSkin line seamlessly merges mobile protection and user interactivity into a single enjoyable experience Every Full Body Protector for Nokia Lumia 521 is backed by our Lifetime Replacement Warranty and 100% Satisfaction Guarantee