Galaxy S7 Edge Bumper, 3D Curved Surface CNC Aviation Aluminum Alloy Metal Scratch-Resistant Built-in Sponge Drop Protection Bumper Frame Shell for Galaxy S7 Edge Black Perfectly designed bumper case with both front and back sides open--for better cell reception! Made of aviation grade aluminum, which is very hard & lightweight. Does not add bulk to your phone--like other cases. The bumper is precisely cut with a CNC machine from a solid block of aircraft grade Metal Slider, ensuring super snug fit with great drop protection. The Anodic oxidation color is long-lasting and does not degrade for years. Comes with free screws and screwdriver. Smooth surface provides very good feel & precise cutouts to fit your phone perfectly. The height of the corners of the case are 2 mm larger than cell phone, which protects the phone in case of a fall onto, or scratches from dragging it across flat surfaces such as a desk, table or floor. Sponge inside frame fully further protects your phone from shock. The perfectly matched buttons give you the same feel as the original phone. Nice packaging makes it a good choice for a gift.