Black Phophsate Drywall Screw Tianjin Ruiya Internation St Co., Ltd. Base Info Model NO.:DWSMaterial:Carbon SteelType:Hexagon HeadHead Style:RoundConnection:Common BoltGrade:12.9Trademark:E-starOrigin:China Mainland Description Pre:Bugle Head Black Phosphate Drywall Screw with Phillips Drive (C1022) Next:Drywall Screws 3