Structure? When tightening the screw the gap in the ribbed anchor is expanded on two opposite sides to increase the fixing force.
kaileyouxiangongsi Hollow-Wall Anchors Drywall Anchor kit with Screws
$5.95
Category: Hardware Accessories
$5.95
Structure? When tightening the screw the gap in the ribbed anchor is expanded on two opposite sides to increase the fixing force.
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