1.The fee listed for all products is for a single unit, and the goods don't come with screws. Buyers should buy screws separately.2.The installation of screws relies on the purposes of the customer installed, because the set up of the thickness of the plate isn't the same, the size of the screws are different, and there are metric components imperial formula U.S. system, there are cup head countersunk head pan head ball head facets or fixed with screws and nuts or self-tapping screws, so the vendor does not convey screws, please understand!3.Damping hinge, the initial state generally cannot rotate, installed at the drive would be lively (or with the help of a wrench to turn), now not normal hinges.