Hammer Shield - All-in-One Super Impact Proof Screen Protector for Apple&reg; iPhone&reg; 4 and 4s Hammer Shield is an All-in-One Screen Protector with the following features: - Super Impact Proof - 95% Crystal Clarity - Zero Air Bubble - Anti-Fingerprint - Anti-Scratchacterial - Easy Installation - Anti Fingerprint - Anti Scratch - Self Healing Anti-Bacterial Easy Installation Self-Healing FREE Shipping