In daily life, hardware action is quite big, inferior hardware can make casement open not agile, push do not move, close lax, prolapse falls off even, bring trouble and inconvenience to consumer. Hardware of window of foreign high-grade door the price, already was close to or exceed the value of door window itself. Concerned expert points out, hardware the price, class and life are the crucial factor that restricts door window social status and life. Consumer should notice when choosing hardware a few skill are mixed a few principle. As a whole, appropriate chooses the lock with agile good performance. There can be the key to insert when the choose and buy unplug a few times look suitable not smooth, switch is pigheaded rise to whether save interest. The sort with choose exterior property good decorates hardware. The exterior basically looks to whether have drawback when the choose and buy, eletroplate burnish how, feel is slick etc. Should choose sealed function to add up to leaf, slippery course, lock, hinge well. Leave when the choose and buy close, pull change a perception a few times its flexibility and convenient sex. (iron line handicraft) door window fittings kind hardware is commonly used often the hardware of bring into contact with, the following item should notice when the choice. Door window and fittings: Must accord with design requirement, norms model should accord with national level. Door lock: Should be the safety lock of double-faced open. Compare the weight of the lock with feel, heavier demonstrative key cylinder uses data thicker, wear-resisting caustic. Conversely, criterion bill of material is thin, easy attaint. The face that sees lock is bright and clean degree, smooth, without stain. Open repeatedly, see the acute rate of key cylinder bedspring. Sliding door: Choose stainless steel, pulley to be able to choose horniness nylon annulus, pulley wearing, it is galvanization steel commonly. Sealed material: Should choose sealed balata, cooperate to use waterproof fluid sealant. Ground bedspring: The ground bedspring of the door, should be stainless steel face or be cupreous range, before be being used formally after outfit is good, should undertake around controls an adjustment that closes career, use in order to facilitate. Hydraulic pressure part cannot leak oily. Also can use calm door implement.