Deff CLEAVE Hybrid Carbon Fiber and Aluminum Ultra Strong Bumper for Xperia Z3 (Carbon Black) A unique hybrid of aluminum alloy and carbon fiber. Customize your Xperia Z3 with this stylish, streamlined case. Uses thelightweightA6063aluminum alloy used for industrial products and carbon fiber You can attach the case with the supplied screw. You can fasten it with your fingers The new Quick Lock system eliminates the need for special screws. Supports Deff magnet charting terminal Open the top of the bumper by turning the screw counterclockwise. Place your Xperia X3 gently in place.