for Samsung Galaxy Book 12" inch Tempered Glass Premium Screen Protector Guard 9H HD Anti Fingerprint and Scratch 99% Light Transmission Perfect Touch (2-Pack)

Also known as toughened glass, tempered glass is 4 to 5X stronger than normal glass and is made by heating glass and then cooling it very quickly, after which it is further chemically strengthened by a surface finishing process.
Unlike traditional plastic screen protectors, tempered glass helps absorb impact from drops, leaving the tablet screen below intact. Simply remove the broken glass screen protector and replace with a new one-a worthwhile investment since broken tablet screens are expensive to repair.

This is a guide about glass film installation
Step 1. Keep your hands clean before peel the No.1 layer off the film.
Step 2. Align the film with your tablet screen sides.
Step 3. Carefully put the ADHESIVE PART on tablet screen from the left side to right.
Caution:Products in high quality, but it is glass film, have the chance to be crack. So when you receive this film, please open the outer packaging around the edges lightly and carefully.

This is a guide about glass film installation
1. Preparation: clean the screen using wet wipe cloth by remove dust and contaminants.
2. Keep your hands clean before peel off first protective layer (attached with label step1).
3. Carefully place screen protector on the screen to complete the installation process.