Trox Conrete Screws Tianjin Ruiya Internation St Co., Ltd. Base Info Model NO.：CSMaterial：Carbon SteelType：Hexagon HeadHead Style：RoundConnection：Common BoltGrade：12.9Trademark：E-starOrigin：China Mainland Description Pre：Self-Driling Screw (Countersunk Head White) Next：Self Driling Screw-Black
