grey plastic butterfly-type dowel fixed insheet of moisture-resistant drywall, view in section of end of sheet,

anchor assembly attached background board buster butterfly butterflytype can connection construction custard cut design dowel drilled drilling drywall end fastener fiber fixed fixing gray grey gypsum hole hollow house industrial installation interior iron isolated metal moistureresistant mounting open panel plasterboard plastic polyethylene polypropylene predrilled reliable resistant room screw screwing section see sheet site spacer twist view wall wallboard white