Our screen protectors are rated at 5H hardness. By definition, there are still quite a few items that are able to scratch it. Keys and coins in a pocket will not scratch it under normal circumstances, unless the keys have pointed edges. Please note micro-scratches will happen due daily usage and the environment the screen protector is used in.
Our Gorilla Series on the other hand is rated at 9H hardness. It is less likely to get scratched. However, please be aware that due to daily usage and the environment it is in, the screen protector still can get scratched.