Amzer TPU-PolyCarbonate Hybrid Case for BlackBerry Curve 8520, Curve 8530, and Curve 3G 9300 - 1 Pack - Black The smooth outer back shell provides sure grip to keep your device from dropped or bumped. Precise cutouts give easy access to all the functionalities. Precisely engineered includes custom cutouts to fit your device perfectly. Easy installation, just snap on your phone without any tools, also very easy to take off, no tools needed. This case is made up of a hybrid of the contemporary TPU skin case and the classic Polycarbonate hard case.