Reliable Letter Box Suppliers for Security Solutions

Shyh Ru Metallic Industrial Corp. was founded in 1968, with the aim and aspiration to produce user friendly Cash boxes for customers in Taiwan. At that time, the portable cash box market was dominated by Japanese brands.

In recent years, Shyh Ru has focused on research and development to produce new and innovative products for its clients, while at the same time enhancing its quality standard. To ensure the highest possible security for its clients, features utilizing state of the art technology such as alarm systems and digital keypads are built and incorporated into Shyh Ru’s latest models of the cash boxes and key boxes.

With its exemplary quality, first rate service and product warranty, Shyh Ru has established its reputation as a reliable and excellent manufacturer on the global market, selling to over 30 countries around the world. To better serve its clients, Shyh Ru will continue to innovate and enhance its brand name and presence in international markets.


As a reputable letter box supplier, we understand the importance of providing secure and reliable solutions to meet the diverse security needs of our customers. With our extensive experience and commitment to excellence, we have established ourselves as trusted partners in the industry.


When it comes to safeguarding your valuables, it is crucial to choose letter box suppliers that prioritize security and reliability. From robust materials to advanced locking mechanisms, our letter boxes provide optimal security for your valuable items. As dedicated letter box suppliers, we understand that each customer has unique needs and preferences. That's why we offer a diverse range of designs, sizes, and features to meet different requirements. Whether you prefer a traditional key lock system or a more advanced electronic access control, we have options that will suit your preferences.


When you choose us as your letter box suppliers, you can expect not only high-quality products but also exceptional customer service. In conclusion, when it comes to finding reliable letter box suppliers, trust the industry experts who prioritize security and reliability.  Choose us as your trusted letter box suppliers and enhance your security today.