Our company established in 1994, is a private export enterprise. We are a manufacturer, we produce self-drilling screw, self-tapping screw, drywall screw, full-thread screw, concrete nail, coil nail, twisted floor nail, roofing nail, etc. If you need more informations about us, please enter into our web site or freely contact us ,I will send you competitive price. I am looking forward to hearing from you early. Best wishes!