Screw, Fastener, Self-Drilling Screw manufacturer / supplier in China, offering Smooth Shank Type Steel Nail with Ballistic Tip for Hard Concrete Building and Gas Nail Applications, Wholesale Price Customized Mechainical Zinc Gas Nails All Color Gas Pin, Xrf 3.5-4.8mm Phosphate Drywall Screws for Multipurpose Construction Use and so on.