Wall plug for attaching e.g. plasterboard to old masonry has arms at top which are spread when screw is tightened and support board and compensate for unevenness in wall

摘要

The wall plug for attaching e.g. plasterboard (2) to old masonry (3) has arms (5) at the top which are spread when the screw (1) is tightened. These support the board and compensate for unevenness in the wall.