Shijiazhuang Shuangjian Company was born in 1951 and for over 70 years, we have been absorbed in designing and manufacturing high-performance files endorsed by worldwide professional tool brands and proficient craftsmen. We want you to enjoy an easy and smooth working experience through our top-grade files.shuangjian takes pride in providing uncompromising quality files that have been designed, tested and improved to deliver best function. Besides, our quality control system ensures our products strictly meet American Standard, Chinese Standard and European Standard separately. Most importantly, our profound experience in the industry allows us to incorporate traditional and advanced technique into full spectrum of our files that boast solid backing by our R&D team, so as to bring out innovation and transcend what you expect. Our journey starting from a vision to produce accuracy and dependable files forms our tradition, to which we keep stand fast today. We believe with every high-quality file, we forge a closer tie with our customers.