NOTE:1)Please be instructed that a product error with in the fluctuate of 2-3mm is considered ordinary and should be expected. We hope this knowledge supports you make an informed decision and guarantees a passable shopping experience.2)The payment indexed for all merchandise is for a single unit, and the goods don't come with screws. Buyers should buy screws separately.3)The set up of screws will depend on the needs of the client installed, since the set up of the thickness of the plate is not the same, the length of the screws are different, and there are metric method imperial method U.S. system, there are cup head countersunk head pan head ball head elements or fixed with screws and nuts or self-tapping screws, so the seller does not convey screws, please understand!4)Damping hinge, the preliminary state commonly cannot rotate, put in on the drive would be energetic (or with the help of a wrench to turn), no longer ordinary hinges.