HIOTECH Aviation Aluminum Metal Ultra-thin Frame for iPhone 7 with Screwdriver & Screw [Built-in Protective Cotton & Metal Button] (Black) AVIATION ALUMINUM METAL & PROTECTIVE COTTON: Adopts the Aviation Aluminum material, durable & resistance to fall. Frame built-in protective cotton, avoid all kinds of friction damage. UNIQUE & INNOVATIVE AUDIO PROTECTION: Unique & innovative design, combining with the principle of sound propagation. Keep the better sound quality! SIMPLE INSTALLATION: Put the mobile phone into frame, then fixed it with Screwdriver & Screw (Include). Not easy to fall off! DIAMOND TRIMMING DESIGN: More suitable for holding, anodic oxidation process. Don't rub off. Non-slip, Anti-sweating, Anti-fingerprints. FULL HIOTECH WARRANTY: If You're Not Completely Satisfied with Your Purchase, Simply Let us Know and You'll be Offered a FULL Refund or Replacement, No Questions Asked. Enjoy this Absolutely RISK FREE Purchase Today by Clicking the Yellow "ADD TO CART BUTTON" Above.