Ningbo Nbu Ad. Design Co., Ltd. was established in 2012, which is specialized in development, production and sale of automatic screw fastening device and electric screwdriver, and we also provider screw fastening process solution. Honest, stable, and innovative are our operation principle, product image and quality are continuously upgraded. Products gained widespread recognition and trust from customers! We focused on the screw fastening technology , with our continuous efforts , we has successfully upgraded our single model and the changing track mode to a generalization screw feeder mode ,which can solve the waste of resources , low...