Anti Slip Serrated Plastic Wall Plug Nylon Grip Anchor Expansion Insert for Secure Solid Wall Fixing Product Description The Anti-Slip Serrated Plastic Wall Plug features a micro-serrated external surface that creates maximum friction between the plug body and the borehole wall, preventing rotation and pull-out during screw tightening and long-term use. The serrated geometry is precision-molded into the nylon PA6 or PE body during injection, with each micro-tooth acting as an