DELI Group is a professional office supply manufacturer, office supply wholesaler in China. We mainly manufacture office supplies such as file holder, pencil sharpener, paper punch, paper cutter, file box, etc. More than 20 years experience makes us clearly know how to satisfy customers' requirements of office supplies. In order to ensure the quality of our file holder, pencil sharpener, paper punch, paper cutter, file box, etc., Deli established its own research and development centers. In addition to advanced production and design technology, Deli also implements a strict quality control system, overseeing each step, from raw material to production lines. Our raw materials adopt imported Korean PP material, Germany ink and Switzerland nibs, etc. As a result, our office supplies have received ISO9001-2001 and ISO14001 certificates. They are commonly used in America, Japan, Germany, and the UK as well as many other parts of the world. Show Less