Colorful High Quality Perfect Premium Tempered Glass Film Screen Protector for Samsung Galaxy S3 i9300 (Black) Around and key hole position using advanced 2.5 D (cambered surface) process, and has the feel is good anti crushing easy point control etc, visual effect is excellent Glass material after high temperature steel processing, surface hardness up to eight - 9 h, impact resistance is strong,not easy and scratches 0.4 mm thickness of curved toughened glass, cutting fine, can perfect, after loading stick, touch more agile, 2.5 D cambered surface impact effect causes the handset screen more solid High-end silicone resin film laminating, make toughened glass protection screen more completely, more human, even if broken,also won't splash around Long time use, eyes not easily fatigue, better protect vision