Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
Advert gave misreading impression that it comes as a pair. Tried my screen repair with just the one, but wasn't strong enough on it's own. Smashed my screen into a million pieces while attempting led backlight replacement.