Masonry Anchor, Tapping Screw, Driling Screw manufacturer / supplier in China, offering Versatile Zinc Plated Hexagonal Flange Concrete Screw for Construction 8.8 Grade/Threaded Zinc Plated Screw/Concrete Flange Threaded Screw, Zinc Plated Concrete Screw/Stainless Steel Concrete Screw/Durable Silver Hexagon Flange Concrete Screw - Silver Hexagon Screw, Vertical Hexagonal Flange Concrete Screw - Silver Inch and Metric Options/Zinc Plated Concrete Screw/Self-Cutting Concrete Fastener M8*75 M10*60 M12 and so on.