Tempered glass screen protectors were introduced in China in 2012, providing excellent protection for mobile phone screens. Since the hardness of iron is lower than that of glass, let alone tempered glass, the surface is sufficiently tough to withstand even heavy scratching with a knife. it may prevent the glass screen from cracking and flying owing to a careless impact of a mobile phone, reducing glass screen damage and ensuring user safety. Additionally, it can stop unintentional scratching. Maintain the aesthetic appeal of your smartphone.