Screw, Fastener, Self-Drilling Screw manufacturer / supplier in China, offering Xrf Manufacture 3.5X25mm Black Gypsum Screw for Ceiling Use, Xrf SS304 SS316 Flat Head Screws with Torx Drive, Xrf High Strength Self Drilliing Screw Truss Head Screw with Pozi Drive and so on.