Tempered Glass

It is also safer than annealed glass when broken. Tempered glass breaks into small pieces or chunks of glass, rather than sharp shards that are more likely to cause injury. This characteristic of “breaking” into smaller pieces when broken is the result of the tension created by the different cooling rates used between the surface and interior of the glass sheet during the manufacturing process so the toughening process rearranges the molecules of a float glass sheet to toughen it.

Tempered glass can resist more pressure than ordinary glass up to 30-40 kilograms.
When toughened glass breaks in its place while keeping its integrity. Yet, it leaves smaller pieces of broken glass that won’t cause great harm as float glass shards would.