Black Phosphated Bugle Head Drywall Screw Tianjin Ruiya Internation St Co., Ltd. Base Info Material：Carbon SteelType：Hexagon HeadHead Style：RoundConnection：Common BoltGrade：12.9Trademark：E-starOrigin：China Mainland Description Pre：Bugle Head Self Drilling Screws Next：Self-Drilling Screw with Wafer Head
