SOJITEK Microsoft Surface Book Premium Ballistic Tempered Glass Screen Protector with Lifetime Replacement Warranty - HD Ultra Clear Clarity & Touchscreen Accuracy Smart Film 0.33mm thinness Made in Japan: highest-quality premium tempered glass 99% optical clarity; oil-free, oleophobic coating; 0.33mm super-thin Super anti-scratch: surface hardness rating of 9H Shatter-proof: withstands forces of impact from accidental drops & other damage 2.5D curved edges: smooth swiping & glass chip prevention