High Quality Yellow Zinc Expansion Bolts Steel Drop in Anchor Concrete Anchor Manufacturer Fixdex Fastening Technology Co., Ltd. Base Info Standard：DIN, GBTrademark：FIXDEXOrigin：Handan Hebei Description Pre：Coarse Thread, Black Phosphated Drywall Screw/Sheet Metal Screw Next：C1022 Steel Color Zinc Plated Self-Tapping Screw/Chipboard Screw
