Self Tapping Screw with Slotted Drive Tianjin Ruiya Internation St Co., Ltd. Base Info Model NO.:STSMaterial:Carbon SteelType:Hexagon HeadHead Style:RoundConnection:Common BoltGrade:12.9Trademark:E-starOrigin:China Mainland Description Pre:Zinc Wood Screw With Cross Head Next:Drywall Screws Fine Thread