The current anti-theft security door security doors rankings uneven and varied, some businesses Again grocery store, operating a variety of security doors. How should consumers identify qualified security doors buy it? A summary of the following INDUSTRIES: 1 rating criteria: security door security level can be divided into Class A, Class B and Class C, Class D, Class-theft performance of which the highest, Class B and Class C Second, the minimum D grade level. We have seen in the building materials market mostly Class C, D grade security door security doors, more suitable for general home use. 2, inspection plate: state regulations, security doors of the plate thickness to reach 1 mm, but some companies in order to reduce costs, some only 0.4 mm steel plate thin on meaningless theft. According to the security door business introduction, consumers test plate, you can push the doors in steel, if the plate is pressed down, show off, but the quality of the security door. 3, check the next step: a qualified stainless steel security door step, but some small workshop in order to reduce costs, I use stainless steel iron. When I visited Nanchang new multi-security doors, the boss introduces an identification tips security doors dimensions, placed under the foot on the magnet, the magnet suck if difficult to get open, indicating that the next step material failure. 4, good lock only locks points: qualified security door locks generally use three position lock, lock not only locks up and down the bar can be inserted locked door to be fixed. Some businesses use more often locked to attract consumers, in fact, a good lock is not locking points better, not anti-theft lock cylinder, more locking points are useless. A Run Industry and Trade wants consumers to use these methods together, buy genuine products. Now people have advocated the idea of ??energy conservation. Therefore, in order to extend the life of security doors, we must in our daily lives to it for maintenance. Characteristics of the product is not the same, maintenance methods are not the same. Here a detailed INDUSTRIES security doors that how it is maintained. 1, when the face of the door key can not be fully inserted into the keyhole, if in the winter, you want to first check whether the key hole icing; if the other seasons, check whether the key hole of a foreign body. 2, I heard the door switch with metal security doors friction sound production, to try a little oil can drip on the security door hinge, if valid, you can find a professional repairman. 3, when the security door closed resistance is too large, it can be coated with a little oil in the activities of the tongue. 4, the installation of security doors, should seriously filling cement, between the door frame and the wall so closely integrated and effective, so you can make between the door and the door frame to keep reasonably fit, long-term use without fear of deformation. 5, if inserted into the cylinder operating difficulties if the door, you can smear a little graphite. Or insert the lock cylinder with a pencil. Security doors rankings | A Run Industry and Trade to ensure product quality | Shanxi security doors provided by a Run Industry and Trade Co., Ltd. Zhejiang. Zhejiang A Run Co. (www.zjyrgm.com) is an industry leader in Jinhua, Zhejiang, security doors, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Run Industry and Trade in a leadership with the staff warmly welcome all inquiries negotiations to create a better future for Run Industry and Trade.