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Ensuring Quality Excellence in Steel Door Production | USELUCK's Rigorous Inspection Process


01 A professional quality inspection team for each process

Our production process is divided into multiple stages, with dedicated quality inspectors assigned to each stage. From the acquisition of raw materials to processing and final assembly, every step undergoes rigorous quality checks. Only products that pass inspection proceed to the next stage, ensuring the continuity and stability of the production process.


02 Rigorous quality inspection before installation and packaging

In the final stages of product assembly, we have established a dedicated quality inspection step to ensure that each iron door undergoes a meticulous final check before installation and packaging. This step is crucial to ensuring the ultimate product quality, with every detail thoroughly verified to ensure there are no defects.



03 Regular sales sampling checks to guarantee qualified products

We are well aware that once products leave the factory, they represent our brand image. Therefore, we take proactive measures. Our sales team conducts regular sampling checks each week on packaged products. This periodic sales sampling not only ensures product quality but also allows us to be more responsive to market demands and customer feedback.



04 Establishing a comprehensive quality traceability system

To better address potential quality issues, we have implemented a comprehensive quality traceability system. Each steel door is uniquely identified, enabling us to trace back to specific production stages, operators, and raw materials. This helps us discover the root causes of problems promptly and take corrective measures swiftly.



Conclusion and Outlook

Through meticulous design of the production process and rigorous quality checks at every level, the quality of our steel door products has been effectively enhanced. Strict control over production quality is not only our responsibility to customers but also a guarantee for the long-term development of our business. In the future, we will continue to strengthen quality management, constantly elevate our technological expertise, and provide customers with even more outstanding products and services.



USELUCK belongs to Zhejiang Xinmi Intelligent Technology Co., Ltd.  Our factory is located in Yongkang and Wuyi City, Zhejiang Province, China. We are a professional security door manufacturer with over 20 years, of integrating R&D, production, and sales.

Our company's predecessor was NIUNIU DOOR, and its subsidiary Yongkang Hongyuan Import and Export Co., Ltd. is responsible for the import and export business. There are many online and offline brands at home and abroad, such as "USELUCK", "NIHAO", "皇马", "一念山河", "领赞", "顶上情怀". Multi-channel and multi-brand expansion to meet the diversified needs of the domestic and abroad market. We insist on investing in R&D, taking a high-quality route, and providing good services. Now our factory has become a leading door manufacturer.













浙江鑫米智能科技有限公司位于浙江永康,是一家超过二十年的防盗门制造商,集研发生产销售于一体。公司前身叫百拓牛牛(NIUNIU DOOR),旗下子公司永康市宏远进出口有限公司专门负责进出口业务。并有线上线下,国内国外众多品牌,如“USELUCK”“你好”“皇马”“一念山河”“领赞”“顶上情怀”等品牌。多渠道多品牌拓展,满足市场的多元化需求。我们坚持研发投入,走高品质路线,做好服务,现已成为领先的门类制造商。







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Useluck Security Door
Factory: Baiyang Industry Area, Wuyi City, Zhejiang Province,China.
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