For Full ab glue apple watch 1 : 0.33MM/3D curved , 3D hot bending craft ,very comfortable edge hand-feeling and the edge No scratch felling . 2: small silk with edge , unoccluded apple watch screen position 3: Secondary tempered glass ,use your fingers press the edge ,No broken . 4: More safely ! because The anti-explosion material around the edge , because the anti-explosin material can make all glass glue together even when glass was broken. no hurt your hand !