... and 70%with L/C copy Gaomi Hualong Hardware Industrial Ltd., located in Shandong peninsula, 70km away from Qingdao Port, ... specialized in manufacturing each kind of architectural hardwares including barbed roofing nail,wire nail,steel nail,iron hinges,bolts, knob and ... of the biggest factories which produce common wire nail, umbrella roofing nails, coil nail, building nails, screw nail, concrete nail, ...