Why villa door lock is used long surface or to buy like that?

Either China or the world standard, villa door panel is salt spray test, count as the standard, Chinese standard is plating surface with salt spray test 24 hours no corrosion phenomenon, Can be up to level 6 standard) Is qualified. Generally speaking, as long as can reach more than 36 hours under normal use is available in three to five years, except special not normal use, and is proved in the process of using lock customer locks have been maintenance, using a three to five or ten years will be more with more durable, like the appearance of buy villa door.