1.Good thermal stability

Tempered glass is produced by heating annealed glass in a furnace to 620°C. Progressing from the furnace, the glass is rapidly cooled with jets of cold air, inducing compressive stresses to the surface while the center remains tensile.

2. High security
If breakage occurs the glass breaks up into small, cubical fragments,
which are not threatening to humans. So it was called safety glass.
3. High strength
The shock strength is 3-5 times stronger than the common glass of
the same thickness.