Hebei Duojia Metal Products Co.,ltd is a manufacturing company but also make trading .The most core products are various of sleeve anchors ,just like flange nut sleeve anchor\hex bolt sleeve anchor\o/c/l sleeve anhor and wedge anchor \drop in anchor and so on .The second core products is wood thread eye screw/bolt with welded .Our products mostly produced by Taiwan Manchine .The Craft is simple but delicate.We also introduced welding robots.It can ensure the production yield and quality of welded eye screw/bolt .