Weakness of common Glass Screen Protectors

When your smartphone with tempered glass screen protector is dropped on its edge it is likely to crack.

GLASS SCREEN PROTECTORS
HAVE A COMMON WEAKNESS

Tempered glass strength is developed by applying increased compressive stress to the surface and tensile stress inside through chemical strengthening.
If any cracks reach the internal tensile stress layer, the entire glass will break regardless of the position and size of the cracks.
The traditional process for cutting tempered glass is literally “cutting” using a mechanical method, leaving a very rough surface prone to fracturing.
Therefore, when a device with tempered glass is dropped on its edge it is likely to crack.